Delete Exchange 2013 OWA search history

Hi all,
is there an option to delete the search history in OWA 2013 for some Mailboxes or all users in the database?
Thanks for reply.
Best regards
Malte

Exchange 2013 Search is based on Browser, hence it will be saved in browser rather on the server.
If it's on all the client machine than create a Group Policy to delete the Form Data.
Cheers,
Gulab Prasad
Technology Consultant
Blog:
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Similar Messages

How to Delete Messages in Spotlight Search History without Resetting or Syncing!!

I know there are a lot of individuals dealing with this issue and if you are like me you spend hours searching "how to delete messages in spotlight search history" and it seems like every post either says to reset your phone or sync it! I'm sorry but I did not want to go through the hassle of resetting my phone but I did try to sync it which did nothing so I decided to just mess around with my settings and I believe to have found the answer to everyone's question!!
This worked for me so I really hope this works for you! Just follow the steps below:
1. Go to <settings><general><spotlight search><uncheck messages>
2. Then turn your phone off and wait a minute! Turn your phone back on and off again 2 or 3 more times while waiting a minute in between turning it off!
3. After you are done doing that go back to step 1 and <check messages>!
4. Now go to your spotlight search and those messages should be deleted! If they are deleted I would recommend going back to step 1 and <uncheck messages> so you do not have the same problem with messages showing up again in the spotlight search!
It works for Mail too! Just follow the same steps listed above but uncheck mail instead of messages or do both at the same time!!
*Here is an extra tip which will remove deleted Mail Messages, just follow the steps below:
1. Go to <settings><mail, contacts, calendars><your mail account> scroll down and click <advanced> Now click <remove> under the title Deleted Messages and you can choose to have your mail removed After One Day, After One Week, After One Month or Never.
I hope this post was detailed enough and easy to understand!
I really hope it works for you like it did for me!
Good Luck!!!

I tried this fix and it does not work.
I have read that this is a problem for a long time - years. Me, personally, I do have emails and texts from the past that are private and were deleted, that I do not want my husband or daughter to read. Many people have this complaint and have had it a long time. Why does Apple not fix it?!?
Another privacy issue is the iMessage default settings on new devices. We bought a new iPhone for my college-age daughter and received all of her text messages until we noticed it and told her. We did a temporary fix. Then I got a new iPhone and the same thing happened. I had to set up iCloud accts. for each of us so that we each have privacy that cannot be tampered with. We still share our original iTunes account. Why did that have to happen?!?
We have been Apple consumers (laptops, iPads, iPods, iPhones) for over ten years (? longer w/just desk top) w/ the same account. These breaches in privacy are upsetting!! My point here is that these breaches are unacceptable! The spotlight search issue appears to be unresolved. FIX THIS APPLE!

Exchange 2013 OWA IM to federated users

Hi I configured Exchange 2013 OWA IM for Lync server and everything is working fine except that I can't IM federated Lync users when the conversation is initiated from OWA. When I start an IM conversation from the federated user to my OWA, everything is
working fine. Also the replies arrive then! So it must be something with initiating the session. I don't have issues with federated users form normal Lync desktop clients or mobile clients.
In the lync logs I notice the following when starting the conversation from OWA:
1027;reason="Cannot route this type of SIP request to or from federated partners";
I also notice there's a KB2977259 (http://support.microsoft.com/kb/2977259) that discusses similar things but I'm not working with contacts like that and I guess they don't mean that you have to do this for every federated contact a Lync user has.
Does somebody else also experience this issue?
Update: following this KB I tried to add a new outlook contact in owa and add my sip address as "sip:[email protected]". When doing this it actually work to IM this federated user. But this is actually a workaround you can't expect your users
to implement. I can't believe nobody else has issues with this.

Hi DS_Kevin,
Please post a little more log information. It seems that IM from OWA can’t locate the federated user’s SIP address without the sip prefix.
Best Regards,
Lisa Zheng
Lisa Zheng
TechNet Community Support

Exchange 2013 owa integration with ADFS and cooexistance with exchange 2007

Team,
I have successfully integrated adfs 3.0 and Exchange 2013 owa and ecp. However, we have a coexistence environment with exchange 2007. When you access owa, which then redirects you to adfs, sign-in, and then get redirected back to owa. If your
mailbox is still within exchange 2007, you get a blank login page. If you mailbox is in exchange 2013 then you successfully get the owa page for 2013. The problem is that all exchange 2007 mailbox users get blank pages at login. So I have determined
that exchange 2013 cas is not doing the service location lookup on the mailbox to determine if a redirect to the legacy owa address is needed. Is there a configuration setting that I might be missing? Or does the integration with adfs and owa not support
the much needed mailbox lookup for a coexistance environment? A side note: if we enable FBA with owa, both login scenarios work just fine (legacy and new 2013). The legacy namespace has been created, and applied to the exchange 2007 urls.

Hi,
Try using AD FS claims-based authentication with Outlook Web App and EAC
http://technet.microsoft.com/en-us/library/dn635116(v=exchg.150).aspx
Thanks,
Please remember to mark the replies as answers if they help and unmark them if they provide no help. If you have feedback for TechNet Subscriber Support, contact
[email protected]
Simon Wu
TechNet Community Support

Exchange 2013 OWA internal only

Hi all,
Does anyone know how to restrict Exchange 2013 OWA for internal only, but can't impact Exchange ActiveSync service?
I guess IP Address and Domain Restrictions can make it, but it may impact ActiveSync.
Any good solution?
Thank,
Ian

Hi,
Based on my research, we can install the CAS and Mailbox roles in separate two servers. Then we can create new website with a unique IP and only adding ActiveSync to that website. That would give us a website hosted on the box that served the ActiveSync
devices but nothing else, leaving the OWA open for internal access. The firewall would point to this website/IP on the CAS. We could also create a virtual directory under there for /OWA and /Exchange which would serve up the generic ““this service is no longer
available, please contact the help desk” message as the default webpage
http://blogs.technet.com/b/messaging_with_communications/archive/2011/05/02/how-to-block-owa-for-external-users.aspx
Thanks,
Angela Shi
TechNet Community Support

Publish Exchange 2013 OWA + Active Sync + Outlook Anywhere using TMG 2010

We plan to publish our new Exchange 2013 SP1 servers (3 in DAG) outside corporate network using TMG 2010. I am looking for some guide how to do it in the proper way. What I found is little old and does not take into consideration Exchange 2013
SP1
http://blogs.technet.com/b/exchange/archive/2012/11/21/publishing-exchange-server-2013-using-tmg.aspx
Any advice how to publish Exchange 2013 OWA using form-based authentication and how to use Kerberos Constrained Delegation?

Hi,
The blog below describes some scenarios about publishing Exchange. You could have a look the Scenario 2.
Exchange publishing after TMG/UAG
http://dizdarevic.ba/ddamirblog/?p=168
Note: Microsoft provides third-party contact information to help you find technical support. This contact
information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information
Best Regards,
Joyce
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

How to configure Exchange 2013 OWA with Single Sign On

Hi All ,
How to configure Exchange 2013 OWA with Single Sign On ?
Thanks .

Hi,
From your description, I am not quite sure what you really want to achieve. Could you explain it furthermore? If you need to set up Exchange 2013 OWA single sign on with Exchange 2010, here is a helpful thread for your reference.
Exchange 2013 OWA Single Sign on with Exchange 2010
https://social.technet.microsoft.com/Forums/en-US/2899ebfc-8622-4cdc-8d77-d76b607618f7/exchange-2013-owa-single-sign-on-with-exchange-2010?forum=exchangesvrdeploy
If that is not your case, please feel free to tell me.
Best regards,
If you have feedback for TechNet Subscriber Support, contact
[email protected]
Amy Wang
TechNet Community Support

404 can't find page Error when logging into Exchange 2013 OWA, after a refresh, login works

Hi,
I've upgrade two of my customers to Exchange 2013.
On of them was coming from 2007, and the other was already running 2010.
Migration from both of the servers went good.
However with the customer which upgraded from 2010 to 2013 i'm experiencing strange OWA behavior:
When I login to OWA on https://owa.contoso.com/owa, and input my credentials and click sign in: I receive this error:
404
can't find page :-(
The page you're looking for couldn't be found on the server.
X-FEServer: JVBMAIL01
Date: 11-6-2014 11:54:48
Fewer details..
-> Refresh the page
In the addressbar, the following URL is displayed: https://owa.contoso.com/owa/auth/errorFE.aspx?httpCode=404
But... when I click: "Refresh the page" of just hit F5, the login proceeds, and my OWA is displayed and working fine.
This behavior only happens with my customer which was upgraded from 2010 to 2013.
The customer which i've upgraded from 2007 to 2013 doesn't experience this problem.
I've matched the IIS settings and redirect/ssl options on both servers. They are the same.
I've tried other users and i've experienced that on one user, the error message didn't appear.
When I try to delete the Exchange atributes from the user, (after exporting the mail to a PST file) and re-add the Exchange attributes, the message is gone. This isn't a solotuion however, since i've got 166 users, and about 150 of them, get the error message.
New users don't get the error.
Anybody got any clues?

Hi,
From your description, I would like to verify the following thing for troubleshooting:
Please make sure that the authentication is set to Basic Authentication and Forms Authentication is disabled on OWA and ECP virtual directly in IIS. After the above settings, please restart IIS by running IISReset /noforce command.
Hope it helps.
Best regards,
Amy Wang
TechNet Community Support

Exchange 2013 OWA HTTP 500 error when opening another mailbox

We have an Windows Server 2012 Exchange 2013 server with OWA.
All users can login fine, but when I open another mailbox with my Admin account, having enabled access to that user's mailbox, the URL redirects to /owa/auth/errorfe.aspx?httpCode=500 and shows:
something went wrong
Sorry, we can't get that information right now. Please try again later. If the problem continues, contact your helpdesk
Google won't help me in this instance. Where in the eventlog are OWA events logged?

Hello,
I am joining to the thread opener, however, we do not use exchange server. we are using the Cloud services through Microsoft and as far as I know, the version is 2013 wave 15 (again, through Microsoft's cloud).
when I open the outlook, I can see the shared mailbox just fine.
when I open the office web access, and I search the mailbox through the 'add another mailbox..' It finds it however when I press the add button I get the HTTP 500 error.
when I tried to open a different mailbox (another shared mailbox I gave myself permissions for), it opens just fine.
it seems (from what I can tell) it is this specific shared mailbox that I cannot open through OWA while others I can.
when I try to open the mailbox in question through a different internet browser (Chrome) I get this Error:
NegotiateSecurityContext failed with for host 'db3pr04mb138.eurprd04.prod.outlook.com' with status'LogonDenied'
the error seems to be persistent on this specific mailbox only regardless to what browser I am trying to access with.
I can only assume that the solutions you (Winnie) offered isn't relevant in my case.
thanks in advance for any attempt to help me with this issue.

Exchange 2013 OWA Intergration - More than 1 CAS - not working?

Hello,
Not sure why I can't get this working properly in my test lab. My admin user is unable to sign in through OWA to Lync but the actual client works fine. I get the "there is an error, contact your system administrator." I followed the TechNet article
here http://technet.microsoft.com/en-us/library/jj688098.aspx. Here is my configs
PS C:\Users\Administrator.R5A> get-cspartnerapplication
Identity : Exchange
AuthToken : Value=https://autodiscover.domain.tld/autodis
cover/metadata/json/1
Name : Exchange
ApplicationIdentifier : 00000002-0000-0ff1-ce00-000000000000
Realm : domain.tld
ApplicationTrustLevel : Full
AcceptSecurityIdentifierInformation : False
Enabled : True
PS C:\Users\Administrator.R5A> get-csoauthconfiguration
Identity : Global
PartnerApplications : {Name=Exchange;ApplicationIdentifier=00000
002-0000-0ff1-ce00-000000000000;Realm=DOMAIN.
TLD;ApplicationTrustLevel=Full;AcceptSecuri
tyIdentifierInformation=False;Enabled=True
OAuthServers : {}
Realm :
ServiceName : 00000004-0000-0ff1-ce00-000000000000
ExchangeAutodiscoverUrl : https://autodiscover.domain.tld/autodiscover/a
utodiscover.svc
ExchangeAutodiscoverAllowedDomains :
PS C:\Users\Administrator.R5A> get-cstrustedapplication
Identity : torsv-excas01.domain.tld/urn:application:outlook
webapp
ComputerGruus : {torsv-excas01.domain.tld sip:[email protected];gruu;opaque=srvr:outlookweba
pp:ybjGB5gixFCrsTQrQHNQHAAA}
ServiceGruu : sip:[email protected];gruu;o
paque=srvr:outlookwebapp:ybjGB5gixFCrsTQrQHNQHAAA
Protocol : Mtls
ApplicationId : urn:application:outlookwebapp
TrustedApplicationPoolFqdn : torsv-excas01.domain.tld
Port : 5199
LegacyApplicationName : outlookwebapp
Identity : torsv-excas02.domain.tld/urn:application:outlook
webapp
ComputerGruus : {torsv-excas02.domain.tld sip:[email protected];gruu;opaque=srvr:outlookweba
pp:NVWngwaX91yyXJLGooUVkwAA}
ServiceGruu : sip:[email protected];gruu;o
paque=srvr:outlookwebapp:NVWngwaX91yyXJLGooUVkwAA
Protocol : Mtls
ApplicationId : urn:application:outlookwebapp
TrustedApplicationPoolFqdn : torsv-excas02.domain.tld
Port : 5199
LegacyApplicationName : outlookwebapp
PS C:\Users\Administrator.R5A> get-CsTrustedApplicationPool
Identity : TrustedApplicationPool:torsv-excas01.domain.tld
Registrar : Registrar:sip.domain.tld
FileStore :
ThrottleAsServer : True
TreatAsAuthenticated : True
OutboundOnly : False
RequiresReplication : False
AudioPortStart :
AudioPortCount : 0
AppSharingPortStart :
AppSharingPortCount : 0
VideoPortStart :
VideoPortCount : 0
Applications : {urn:application:outlookwebapp}
DependentServiceList : {}
ServiceId : 1-ExternalServer-1
SiteId : Site:MySite
PoolFqdn : torsv-excas01.domain.tld
Version : 6
Role : TrustedApplicationPool
Identity : TrustedApplicationPool:torsv-excas02.domain.tld
Registrar : Registrar:sip.domain.tld
FileStore :
ThrottleAsServer : True
TreatAsAuthenticated : True
OutboundOnly : False
RequiresReplication : False
AudioPortStart :
AudioPortCount : 0
AppSharingPortStart :
AppSharingPortCount : 0
VideoPortStart :
VideoPortCount : 0
Applications : {urn:application:outlookwebapp}
DependentServiceList : {}
ServiceId : 1-ExternalServer-2
SiteId : Site:MySite
PoolFqdn : torsv-excas02.domain.tld
Version : 6
Role : TrustedApplicationPool
Test-CsExStorageConnectivity works fine.
What's weird is when I try testing OWA IM login and use the SIP debugger I see this entry.
Start-Line: NEGOTIATE sip:127.0.0.1:5061 SIP/2.0
FROM: <sip:sip.domain.tld>;ms-fe=torsv-lync01.domain.tld
TO: <sip:sip.domain.tld>
CALL-ID: 4a017cf0e45a4bd7b1a78bdd83821277
CSEQ: 1 NEGOTIATE
VIA: SIP/2.0/TLS 192.168.1.9:65137
MAX-FORWARDS: 0
CONTENT-LENGTH: 0
SUPPORTED: NewNegotiate
SUPPORTED: ECC
REQUIRE: ms-feature-info
SERVER: RTC/5.0
$$end_record
Why are the TO and From fields showing the same thing? What am I missing
Exchange CAS 1 and CAS 2 running Exchange 2013 SP1 on Server 2008 R2
Lync 2013 with latest windows updates.

For anyone that finds this in Google and has separated Exchange 2013 roles or had this issue I resolved it with the help of Microsoft.
First issue
- Web.config edits on MBX servers instead of CAS. You do NOT do any web.config edits on the CAS server. The reason is the CAS server proxies the request to Mailbox servers and the actual server connecting to Lync is your mailbox servers.
- Verify that your IIS port 443 binding on your mailbox server for both backend / default website the certificate matches and has all the names in it.
- Thumbprint that you put in your web.config file should be the cert thumbprint currently equipped on your Mailbox server.
Second issue I had was the Lync config wasnt correct. We deleted all the trusted application servers and recreated the trusted application server by creating new multi trusted app. added in the two CAS servers. then recreated the New-CsTrustedApplication
to tie with the newly created application server pool.
iisreset on all the servers and then the issue was resolved!
The reason why the SIP request was malformed was due to not having the web.config edits done properly.

Exchange 2013 - OWA "Something Went Wrong", Out of office in Outlook "Server unavailable"

Hi,
We have a new deployment of Exchange 2013 CU2 V2 running on a Windows 2012 server. Everything has been running without issues and then without any real clue to why, we are now getting an issue where OWA says "Something Went Wrong" after processing
your login, (it appears to process the login as if I type in incorrect details it tells me the password/username is wrong).
At the same time we have also lost the ability to run the Out Of Office in Outlook which comes back saying the server is not available and we can't seem to share calendars correctly either. (Can set Out Of Office via the Management Shell without issues).
When running a Get-Serverhealth on the OWA.Protocol it tells me the OWASelfTestMonitor is unhealthy.
I've tried re-creating the OWA, EWS Virtual Directorys and also the autodiscover but with no effect. I've also restarted the server.
Outlook 2013 and mobile phones are working fine on the server and the Exchange Admin Centre is also working without issues.
I am getting tempted to apply CU2 again to see if this sorts it but don't really like doing this on a server with 50 live users on it...
In the eventlog I can see lots of the 2 errors listed below which seems to line up. (System Log and Application Log seem to be clear of other errors or warnings.)
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 04/11/2013 11:25:00
Event time (UTC): 04/11/2013 11:25:00
Event ID: 2fcdb9112c794b63a9ea9577a23e4603
Event sequence: 2
Event occurrence: 1
Event detail code: 0
Application information:
    Application domain: /LM/W3SVC/2/ROOT/owa-411-130280378905273269
    Trust level: Full
    Application Virtual Path: /owa
    Application Path: C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\owa\
    Machine name: SERVERNAME (I altered this for post)
Process information:
    Process ID: 9648
    Process name: w3wp.exe
    Account name: NT AUTHORITY\SYSTEM
Exception information:
    Exception type: HttpException
    Exception message: '.', hexadecimal value 0x00, is an invalid character. Line 1, position 1.
Lots more code.......
AND
Event code: 3005
Event message: An unhandled exception has occurred.
Event time: 04/11/2013 11:24:24
Event time (UTC): 04/11/2013 11:24:24
Event ID: 2586a044b2d74b97a1095aec478bf4ae
Event sequence: 2
Event occurrence: 1
Event detail code: 0
Application information:
    Application domain: /LM/W3SVC/2/ROOT/EWS-668-130280378564324526
    Trust level: Full
    Application Virtual Path: /EWS
    Application Path: C:\Program Files\Microsoft\Exchange Server\V15\ClientAccess\exchweb\EWS\
    Machine name: SERVERNAME (I have changed this for post)
Process information:
    Process ID: 9840
    Process name: w3wp.exe
    Account name: NT AUTHORITY\SYSTEM
Exception information:
    Exception type: HttpException
Exception message: '.', hexadecimal value 0x00, is an invalid character. Line 1, position 1.
lots more data...

Hi Angela,
I can't see any re-directions on the website and have certainly not set any intentionally. I did try installing the Remote Web Gateway on the server and then found that it doesn't work on an exchange box and removed it but the server was working after
this.
The HTTP Redirect in Default Web Site is not showing anything set and the same for the Back End.
The bindings on the default site all look normal with;
http     80   127.0.0.1
https   443 127.0.0.1
http     80    *
http    443   *
The same is mirrored in the Exchange Back End site but with ports 81 and 444.
Running the Outlook auto configure just using Autodiscover all looks good with the URLs listed all pointing to (http)://mail.mydomain.co.uk/whatever... and the log says Autodiscover to (https)://mail.mydomain.co.uk/Autodiscover/Autodiscover.xml Suceeded
(0x00000000)
But, if I type in the OOF address of (https)://mail.mydomain.co.uk/EWS/exchange.asmx I get a login prompt but once user details are entered I then get;
'.', hexadecimal value 0x00, is an invalid character. Line 1, position 1.
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.
Exception Details: System.Xml.XmlException: '.', hexadecimal value 0x00, is an invalid character. Line 1, position 1.
Source Error:
An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.
Stack Trace:
[XmlException: '.', hexadecimal value 0x00, is an invalid character. Line 1, position 1.]
   System.Xml.XmlTextReaderImpl.Throw(String res, String[] args) +163
   System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace() +7572550
   System.Xml.XmlTextReaderImpl.ParseDocumentContent() +62
   System.Xml.XmlReader.ReadToFollowing(String name) +112
   Microsoft.Exchange.Data.ApplicationLogic.Extension.KillBitHelper.ReadKillBitXmlContent(XmlReader reader, Int32& refreshRate) +185
   Microsoft.Exchange.Data.ApplicationLogic.Extension.KillBitHelper.TryReadKillBitFile(Int32& refreshRate, DateTime& lastModifiedTime) +710
   Microsoft.Exchange.Data.ApplicationLogic.Extension.KillBitTimer.Start() +202
   Microsoft.Exchange.Services.Global.Application_Start(Object sender, EventArgs e) +975
[HttpException (0x80004005): '.', hexadecimal value 0x00, is an invalid character. Line 1, position 1.]
   System.Web.HttpApplicationFactory.EnsureAppStartCalledForIntegratedMode(HttpContext context, HttpApplication app) +12864205
   System.Web.HttpApplication.RegisterEventSubscriptionsWithIIS(IntPtr appContext, HttpContext context, MethodInfo[] handlers) +175
   System.Web.HttpApplication.InitSpecial(HttpApplicationState state, MethodInfo[] handlers, IntPtr appContext, HttpContext context) +304
   System.Web.HttpApplicationFactory.GetSpecialApplicationInstance(IntPtr appContext, HttpContext context) +404
   System.Web.Hosting.PipelineRuntime.InitializeApplication(IntPtr appContext) +475
[HttpException (0x80004005): '.', hexadecimal value 0x00, is an invalid character. Line 1, position 1.]
   System.Web.HttpRuntime.FirstRequestInit(HttpContext context) +12880948
   System.Web.HttpRuntime.EnsureFirstRequestInit(HttpContext context) +159
   System.Web.HttpRuntime.ProcessRequestNotificationPrivate(IIS7WorkerRequest wr, HttpContext context) +12722137
Really wishing I had installed Exchange 2010 at this point!! Just can't see why its not working :(

Exchange 2013 OWA published through TMG: Unable to preview documents with Office Web App server

We configured our Exchange 2013 servers to use Office Web App for document previews on OWA. Everything works fine internally, and externally also when we access OWA directly. But when from an outside network we open a OWA session through TMG and try to preview
a document, we get the error "Sorry we cannot open this document, an error occured . . ."
Did anyone experience such an issue ?
Thanks,
Antonio

Hello,
Since directing accessing OWA from CAS is fine and the issue only occur when involving TMG, I think the issue is more related to TMG settings. Please find more efficient support
via our TMG forum:
http://social.technet.microsoft.com/Forums/en-US/Forefrontedgegeneral/threads
Thanks,
If you have feedback for TechNet Subscriber Support, contact
[email protected]
Simon Wu
TechNet Community Support

LYNC 2013, Exchange 2013 / OWA presence not updating from calendar entries

Have a test environment of LYNC 2013 and EXCHANGE 2013.
No software clients - pure OWA access.
IM works within OWA and I can manually set availability which is seen correctly by other users. What does not happen is any calendar entries - they do not update the presence status (ie. does not go to busy when in a meeting ).
I did install Lync client 2013 and that did work ( and updated OWA ) - but I want a pure web environment without the need for additional software based clients.
Can this work? If so is there anything that can be checked to see where the issue is?
Thanks in advance.

Hi,
Maybe it's my misunderstanding. Did you mean you don’t want additional software based clients (including Lync client 2013)?
If you don’t install a Lync client on user workstations, you cannot see presence of Lync users from OWA.
What’s more, for Lync side, if you do not install Lync client software the only way to use Lync is Lync Web App (a browser-based meeting client). Lync Web App only support to join Lync Meetings. However, Lync meeting cannot schedule by Lync Web App and OWA.
Here is a link about Lync Web App may help you:
http://office.microsoft.com/en-in/lync-help/what-is-lync-web-app-HA103699740.aspx
If you want to create Lync Meetings but don’t have Microsoft Outlook you can use Lync Web Scheduler (a web-based program)
More details:
http://office.microsoft.com/en-in/lync-help/lync-web-scheduler-HA103466460.aspx?CTT=5&origin=HA103699740
Best Regards,
Eason Huang
Eason Huang
TechNet Community Support

Lync 2013 presence in Exchange 2013 OWA - 0xc3e93d6a SIPPROXY_E_CONNECTION_UNKNOWN_SERVER

Single Lync 2013 server on Server 2012 R2
Single Exchange 2013 server on Server 2012
Latest patches and updates installed on both servers
Internal Certificate Authority issued certificates
Subject name on EX13 certificate is same as hostname and configured on SMTP, IIS, POP, IMAP, and UM services (Do I even need UM installed?)
I have been working on this for a few days now. I have tried all the blogs and TechNet articles I could find. I even created a list of commands to configure the Exchange and Lync servers.
**Exchange Server
Configure-EnterprisePartnerApplication.ps1 -AuthMetaDataUrl
https://c2nsi-svr-lync1.cantrelloffice.home/metadata/json/1 -ApplicationType Lync
Get-ExchangeCertificate | where-object {$_.services -like “*iis*” } | fl subject, issuer, services, thumbprint
Get-OwaVirtualDirectory -ShowBackEndVirtualDirectories -server c2nsi-svr-ex13.cantrelloffice.home | Set-OwaVirtualDirectory -InstantMessagingEnabled $true -InstantMessagingType OCS -InstantMessagingCertificateThumbprint E32937A41A7658AB8277BE6BD9BEF28D4DC43BFC
–InstantMessagingServerName c2nsi-svr-lync1.cantrelloffice.home
Get-OwaVirtualDirectory | Set-OwaVirtualDirectory –InstantMessagingEnabled $True -InstantMessagingType OCS
Notepad "E:\Program Files\Exchange\V15\ClientAccess\Owa\web.config"
<add key="IMCertificateThumbprint" value="E32937A41A7658AB8277BE6BD9BEF28D4DC43BFC" />
<add key="IMServerName" value="c2nsi-svr-lync1.cantrelloffice.home" />
C:\Windows\System32\Inetsrv\Appcmd.exe recycle apppool /apppool.name:"MSExchangeOWAAppPool"
**Lync Server
Get-Cspool | where-object {$_.services –like “*UserServer*”} | fl site, fqdn
Set-CsOAuthConfiguration -Identity global -Realm "cantrelloffice.home" -ExchangeAutodiscoverUrl "https://c2nsi-svr-ex13.cantrelloffice.home/autodiscover/autodiscover.svc
New-CsPartnerApplication -identity Exchange -ApplicationTrustLevel Full -MetadataUrl
https://c2nsi-svr-ex13.cantrelloffice.home/autodiscover/metadata/json/1
New-CsTrustedApplicationPool -Identity c2nsi-svr-ex13.cantrelloffice.home -Registrar c2nsi-svr-lync1.cantrelloffice.home -Site CantrellOffice -RequiresReplication $False
New-CsTrustedApplication -ApplicationId OutlookWebAccess -TrustedApplicationPoolFqdn c2nsi-svr-ex13.cantrelloffice.home -Port 5199
Enable-CsTopology
Anyone able to help me?

Excerpt from OCSLogger SIPStack log file:
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026d8 (SIPStack,LiteralToIPv6Context::Clear:IPv6Literal.cpp(272))( 00000034F1EBDE60 ) Clear
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026d9 (SIPStack,LiteralToIPv6Context::Append:IPv6Literal.cpp(191))( 00000034F1EBDE60 ) Not an IPv6 literal: 192.168.1.213
TL_NOISE(TF_STACKTRACE) [1]11DC.1678::04/08/2014-01:15:49.882.000026da ((Shared),CSIPGenericParamList::GetParamValue:SIPGenericParam.cpp(231))( 00000034F35DFBE0 ) Enter
TL_VERBOSE(TF_STACKTRACE) [1]11DC.1678::04/08/2014-01:15:49.882.000026db ((Shared),CSIPGenericParamList::GetParamValue:SIPGenericParam.cpp(266))( 00000034F35DFBE0 ) Exit - param=[ms-received-ipv6] not found. Returned 0xC3E93C34(SIPPROXY_E_FIELD_NOT_EXIST)
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026dc (SIPStack,CHeadersHash::GetNextHeader:HeadersHash.cpp(437))( 00000034F71F0438 ) Enter - current header [00000034F35DF9D8]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026dd (SIPStack,CHeadersHash::GetNextHeader:HeadersHash.cpp(469))( 00000034F71F0438 ) Exit - returns header [0000000000000000]
TL_VERBOSE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026de (SIPStack,CSIPMessage::GetNextHeader<CSIPHeader>:SIPMessage.h(2545))( 00000034F71F0070 ) Exit - no more headers found
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026df (SIPStack,LiteralToIPv6Context::Clear:IPv6Literal.cpp(272))( 00000034F1EBDE60 ) Clear
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026e0 (SIPStack,CSIPUrl::AppendLiteralToIPv6Mappings:SIPUrl.cpp(1659))( 00000034F35D8F10 ) Enter
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026e1 (SIPStack,CURI::AppendLiteralToIPv6Mappings:SIPUrl.cpp(420))( 00000034F35D8F10 ) Enter
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026e2 (SIPStack,LiteralToIPv6Context::Append:IPv6Literal.cpp(191))( 00000034F1EBDE60 ) Not an IPv6 literal: 127.0.0.1
TL_VERBOSE(TF_COMPONENT) [1]11DC.1678::04/08/2014-01:15:49.882.000026e3 (SIPStack,CSIPRequest::ValidateInboundHeaders:SIPRequest.cpp(1612))[3583893925]( 00000034F71F0070 ) Exit
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026e4 (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(381))( 00000034F71F0438 ) enter. headerID[0xf]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026e5 (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(413))( 00000034F71F0438 ) exit. header[00000034F35DC150]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026e6 (SIPStack,CMaxForwardsHeader::Parse:MaxForwardsHeader.cpp(42))( 00000034F35DC150 ) enter.
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026e7 (SIPStack,CMaxForwardsHeader::Parse:MaxForwardsHeader.cpp(46))( 00000034F35DC150 ) exit. already parsed.
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026e8 (SIPStack,HeaderSigner::GatherRouteHeaders:SIPMessage.h(174))( 00000034F71F0070 ) Exit - header 00000034F35DC150 found
TL_NOISE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.000026e9 (SIPStack,NegotiateLogic::ParseRequireHeader:NegotiateLogic.cpp(737))[1353035682]( 00000034F5E7A178 ) Enter
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026ea (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(381))( 00000034F71F0438 ) enter. headerID[0x23]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026eb (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(390))( 00000034F71F0438 ) exit. no headers
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026ec (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(381))( 00000034F71F0438 ) enter. headerID[0x2d]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026ed (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(413))( 00000034F71F0438 ) exit. header[00000034F35D8D00]
TL_INFO(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.000026ee (SIPStack,NegotiateLogic::ParseRequireHeader:NegotiateLogic.cpp(758))[1353035682]( 00000034F5E7A178 ) Found legacy compression request
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026ef (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(381))( 00000034F71F0438 ) enter. headerID[0x2d]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026f0 (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(413))( 00000034F71F0438 ) exit. header[00000034F35D8D00]
TL_VERBOSE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026f1 (SIPStack,CSIPMultiEntryHeader::Parse:GenericMultiEntryHeader.cpp(88))( 00000034F35D8D00 ) Unparsed is [LZ77-8K]
TL_VERBOSE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026f2 ((Shared),FindCharNotQuoted:parseutil.cpp(975))could not find character:","(0x2c).
TL_NOISE(TF_STACKTRACE) [1]11DC.1678::04/08/2014-01:15:49.882.000026f3 (SIPStack,CSIPMultiEntryHeader::Parse:GenericMultiEntryHeader.cpp(154))( 00000034F35D8D00 ) exit.
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026f4 (SIPStack,CHeadersHash::GetNextHeader:HeadersHash.cpp(437))( 00000034F71F0438 ) Enter - current header [00000034F35D8D00]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026f5 (SIPStack,CHeadersHash::GetNextHeader:HeadersHash.cpp(469))( 00000034F71F0438 ) Exit - returns header [0000000000000000]
TL_NOISE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.000026f6 (SIPStack,NegotiateLogic::ParseRequireHeader:NegotiateLogic.cpp(846))( 00000034F5E7A178 ) Exit. Returned 0x03E93C01(SIPPROXY_S_MESSAGE_CONSUMED)
TL_NOISE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.000026f7 (SIPStack,NegotiateLogic::ProcessPeerFeatureInfo:NegotiateLogic.cpp(1256))( 1353035682 )( 00000034F5E7A178 ) Enter - 00000034F71F0070
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026f8 (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(381))( 00000034F71F0438 ) enter. headerID[0x27]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026f9 (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(413))( 00000034F71F0438 ) exit. header[00000034F35D8768]
TL_VERBOSE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026fa (SIPStack,CSIPMultiEntryHeader::Parse:GenericMultiEntryHeader.cpp(88))( 00000034F35D8768 ) Unparsed is [NewNegotiate]
TL_VERBOSE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026fb ((Shared),FindCharNotQuoted:parseutil.cpp(975))could not find character:","(0x2c).
TL_NOISE(TF_STACKTRACE) [1]11DC.1678::04/08/2014-01:15:49.882.000026fc (SIPStack,CSIPMultiEntryHeader::Parse:GenericMultiEntryHeader.cpp(154))( 00000034F35D8768 ) exit.
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026fd (SIPStack,CHeadersHash::GetNextHeader:HeadersHash.cpp(437))( 00000034F71F0438 ) Enter - current header [00000034F35D8768]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026fe (SIPStack,CHeadersHash::GetNextHeader:HeadersHash.cpp(469))( 00000034F71F0438 ) Exit - returns header [00000034F35D8978]
TL_VERBOSE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.000026ff (SIPStack,CSIPMultiEntryHeader::Parse:GenericMultiEntryHeader.cpp(88))( 00000034F35D8978 ) Unparsed is [ECC]
TL_VERBOSE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.00002700 ((Shared),FindCharNotQuoted:parseutil.cpp(975))could not find character:","(0x2c).
TL_NOISE(TF_STACKTRACE) [1]11DC.1678::04/08/2014-01:15:49.882.00002701 (SIPStack,CSIPMultiEntryHeader::Parse:GenericMultiEntryHeader.cpp(154))( 00000034F35D8978 ) exit.
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.00002702 (SIPStack,CHeadersHash::GetNextHeader:HeadersHash.cpp(437))( 00000034F71F0438 ) Enter - current header [00000034F35D8978]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.00002703 (SIPStack,CHeadersHash::GetNextHeader:HeadersHash.cpp(469))( 00000034F71F0438 ) Exit - returns header [0000000000000000]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.00002704 (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(381))( 00000034F71F0438 ) enter. headerID[0x5]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.00002705 (SIPStack,CHeadersHash::GetHeader:HeadersHash.cpp(413))( 00000034F71F0438 ) exit. header[00000034F35DB448]
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.00002706 (SIPStack,CFromToHeader::Parse:FromToHeader.cpp(82))( 00000034F35DB448 ) Enter
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.00002707 (SIPStack,SIPHeaderUriParam::ParseHelper:SIPHeaderUriParam.cpp(46))( 00000034F35DB448 ) Enter
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.00002708 (SIPStack,SIPHeaderUriParam::ParseHelper:SIPHeaderUriParam.cpp(51))( 00000034F35DB448 ) Exit - already parsed
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.00002709 (SIPStack,CFromToHeader::Parse:FromToHeader.cpp(90))( 00000034F35DB448 ) Exit
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.0000270a (SIPStack,HeaderSigner::GatherRouteHeaders:SIPMessage.h(174))( 00000034F71F0070 ) Exit - header 00000034F35DB448 found
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.0000270b (SIPStack,CFromToHeader::Parse:FromToHeader.cpp(82))( 00000034F35DB448 ) Enter
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.0000270c (SIPStack,SIPHeaderUriParam::ParseHelper:SIPHeaderUriParam.cpp(46))( 00000034F35DB448 ) Enter
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.0000270d (SIPStack,SIPHeaderUriParam::ParseHelper:SIPHeaderUriParam.cpp(51))( 00000034F35DB448 ) Exit - already parsed
TL_NOISE(TF_PARSE) [1]11DC.1678::04/08/2014-01:15:49.882.0000270e (SIPStack,CFromToHeader::Parse:FromToHeader.cpp(90))( 00000034F35DB448 ) Exit
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.0000270f (SIPStack,CIpAddress::SetIp:IpAddress.cpp(42))( 00000034F1EBE970 ) Enter
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.00002710 (SIPStack,CIpAddress::SetIp:IpAddress.cpp(55))Enter
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.00002711 (SIPStack,CIpAddress::SetIp:IpAddress.cpp(55))Exit - SIPRtlIpv6StringToAddress failed (WINERROR=C000000D). Returns E_FAIL
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.00002712 (SIPStack,CIpAddress::GetIPv4FromStringA:IpAddress.cpp(288))Enter
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.00002713 (SIPStack,CIpAddress::GetIPv4FromStringA:IpAddress.cpp(301))Exit - SIPRtlIpv4StringToAddress failed (WINERROR=C000000D). Returns E_FAIL
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.00002714 (SIPStack,CIpAddress::SetIp:IpAddress.cpp(80))( 00000034F1EBE970 ) Exit FALSE: c2nsi-svr-ex13.cantrelloffice.home is not an IP Address
TL_NOISE(TF_STACKTRACE) [1]11DC.1678::04/08/2014-01:15:49.882.00002715 ((Shared),CSIPGenericParamList::GetParamValue:SIPGenericParam.cpp(231))( 00000034F35DB478 ) Enter
TL_VERBOSE(TF_STACKTRACE) [1]11DC.1678::04/08/2014-01:15:49.882.00002716 ((Shared),CSIPGenericParamList::GetParamValue:SIPGenericParam.cpp(266))( 00000034F35DB478 ) Exit - param=[ms-fe] not found. Returned 0xC3E93C34(SIPPROXY_E_FIELD_NOT_EXIST)
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.00002717 (SIPStack,PeerCertificateKey::CacheDisplayName:PeerIdentityKey.cpp(450))( 00000034F5E7A198 ) Exit - cert name [c2nsi-svr-ex13.cantrelloffice.home]
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.00002718 (SIPStack,CPeerIdentityKey::SetDnsFqdn:PeerIdentityKey.cpp(810))( 00000034F5E7A198 ) Exit - set DNS FQDN to [c2nsi-svr-ex13.cantrelloffice.home]
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.00002719 (SIPStack,NegotiateLogic::ProcessPeerIdentity:NegotiateLogic.cpp(1143))( 1353035682 )( 00000034F5E7A178 ) Enter - peer=[c2nsi-svr-ex13.cantrelloffice.home]
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.0000271a (SIPStack,CConnection::ValidatePeerIdentity:Connection.cpp(544))( 1353035682 )( 00000034F5E68790 ) Enter
TL_NOISE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.0000271b (SIPStack,CPeerIdentity::FindLogicalPeer:PeerIdentity.cpp(86))( 1353035682 )( 00000034F1906F10 ) Enter
TL_NOISE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.0000271c (SIPStack,CPeerIdentity::LookupLogicalPeer_NonEP:PeerIdentity.cpp(124))( 1353035682 )( 00000034F1906F10 ) Enter
TL_VERBOSE(TF_STACKTRACE) [1]11DC.1678::04/08/2014-01:15:49.882.0000271d (SIPStack,KSTImpl::QueryFirstByFqdn:KSTImpl.cpp(895))( 00000034F18FEF80 ) No matches for FQDN=[c2nsi-svr-ex13.cantrelloffice.home]
TL_VERBOSE(TF_COMPONENT) [1]11DC.1678::04/08/2014-01:15:49.882.0000271e (SIPStack,RichResult::InternalAppendContext:RichResult.h(491))[1353035682]( 00000034F1EBE570 ) Context[0] is set to result [0xC3E93D6A(SIPPROXY_E_CONNECTION_UNKNOWN_SERVER)]
TL_VERBOSE(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.0000271f (SIPStack,CPeerIdentity::LookupLogicalPeer_NonEP:PeerIdentity.cpp(154))( 1353035682 )( 00000034F1906F10 ) Exit - no match for the peer identity [c2nsi-svr-ex13.cantrelloffice.home]. Returned
0xC3E93D6A(SIPPROXY_E_CONNECTION_UNKNOWN_SERVER)
TL_ERROR(TF_NETWORK) [1]11DC.1678::04/08/2014-01:15:49.882.00002720 (SIPStack,NegotiateLogic::ProcessPeerIdentity:NegotiateLogic.cpp(1155))( 1353035682 )( 00000034F5E7A178 ) Exit - failed to validate peer with S2S FQDN. Returned 0xC3E93D6A(SIPPROXY_E_CONNECTION_UNKNOWN_SERVER)
TL_ERROR(TF_CONNECTION) [1]11DC.1678::04/08/2014-01:15:49.882.00002721 (SIPStack,SIPAdminLog::WriteConnectionEvent:SIPAdminLog.cpp(389))[1353035682] $$begin_record
Severity: error
Text: The peer is not a configured server on this network interface
Peer-IP: 192.168.1.213:14339
Transport: TLS
Result-Code: 0xc3e93d6a SIPPROXY_E_CONNECTION_UNKNOWN_SERVER
Data: fqdn="c2nsi-svr-ex13.cantrelloffice.home"
$$end_record

Exchange 2013 : OWA failing after login with error "HTTPS 400"

Greetings,
I am in phase of Upgrading my existing Exchange 2007 Infra to Exchange 2013.
The environment is as mentioned below:
4 Mailbox Server (DAG)
4 CAS Servers (NLB)
Everything has been configured and working properly, except Only one CAS server is able to pass the login request
https://servername/owa
Rest of all the CAS servers are failing with error "HTTPS 400" while accessing OWA
https://localhost/owa
Its happening only while accessing OWA, ECP works fine.
Please let me know the fix to counter this strange issue.
Thanks in advance.
Regards

Hi,
Please check if IIS log is enabled on the CAS server, if not, please enable it.
Then check the detailed error code from IIS logs (Path: inetpub\logs\Logfiles\W3SVC1 ) , some code like 400.1, 400.2 ect.
Refer to this KB for more details
http://support.microsoft.com/kb/943891
After that, please post the OWA related login entry with error code shows 400.
Thanks for your time and patience.
Meanwhile, please check the OWA authentication method by command
Get-OWAVirtualDirectory –Server “Ex2013 CAS server” | fl *authentication*
We should set the authentication as the below:
Get-OWAvirtualdirectory -Server “Ex2013_CAS_server” | set-OWAvirtualdirectory -windowsAuthentication $False -BasicAuthentication $True -FormsAuthentication $True
Then perform iisreset and try to access OWA again.
Best Regards.

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