Free/Busy Info Unavailable in OWA & Outlook

When we try to add ONLY "User A" to meeting request using Outlook client/OWA, no free busy information could be retrieved. Other user try to add "User A" to meeting request also receive the same message.
However, when "User A" from her Outlook, she can able to view her free/busy
I'm using Outlook 2010 and running on Exchange 2010. I did ran my outlook testing, availability can be connected.
Please advice

Hi,
Please try Th3B0sS’s suggestion to check the autodiscover service and OOF, EWS service. We can open Outlook - press CTRL key - right click on the Outlook icon from right bottom corner taskbar -
Test Email AutoConfiguration. Put your email address - uncheck use guessmart and secure guessmart authentication - click Test to check your Autodiscover service. Please collect the information in the Results and Log tab.
Since the issue only happens to one specific user, please run the following shell to diagnose Availability service issues for an individual user:
Test-OutlookWebServices -Identity: [email protected]
Please note to run the script New-TestCasConnectivityUser.ps1 to create a test mailbox. For more information about it, please refer to the following article:
Diagnose Availability Service Issues
http://technet.microsoft.com/en-us/library/bb124805(v=exchg.141).aspx
Regards,
Winnie Liang
TechNet Community Support

Similar Messages

Outlook 2010 User can't access free/busy info for one resource mailbox calendar

There are a couple posts that are similar, but I haven't been able to solve this one yet.
We just recently moved our conference room calendars from public folders to proper resource mailboxes. Aside from users not RTFM on how to use them the move has been fairly painless. Until now. I have one user that can't see the free/busy info on one of
the room calendars. Just one. We are using Exchange 2010 and he is on Outlook 2010. When he tries to view a meeting in the calendar he gets an error, "Cannot open this Item. Cannot open the free/busy information."
He has no problem opening meetings for that room on OWA, so it leads me to believe it involves some temp files or cached info on his machine.
I tried using /CleanFreeBusy on his computer and it did not remedy the situation. I removed his profile and added it again which appeared to work, but five minutes later when I got back to my desk he could no longer open the meetings.
Any insight would be much appreciated. I admit I am an amateur when it comes to Exchange admin.

Remove and recreate the Outlook profile from their machine? I did this and it worked for a few minutes.
By resetting his profile do you mean removing his profile from the machine and recreating it after backing up all his user data?

How to share only free/busy info in iCloud calendars?

I currently use Google Calendar to manage my calendars, with some calendars fully shared (view full event details, read/write) with my wife.
I also have been sharing my availability with non-Mac using clients and external partners using Tungle (and am transitioning to TimeBridge, www.timebridge.com now that RIM killed Tungle). Similarly, my wife currently shares free/busy info in her personal calendar with a work colleague who is on Google Calendars as well so he can see her availability even when it is affected by non-work events.
Lately we've been having increasing trouble with random Google sync issues, so I'm considering switching to iCloud calendar sharing instead.
We would like to continue sharing free/busy info with some people, and from what I've read iCloud doesn't have this sort of functionality. Even when a calendar is shared publicly, people can view all event details -- something we definitely DON'T want clients or work colleagues to have full access to.
Is there any way to sync my iCloud calendars into a third-party site like TimeBridge or even Google Calendars so that I can share only my availability externally? Or any other workaround?
Thanks!

Unfortunately, his Mac is not local to me. I would have to drive about 30 miles each way, which is not too bad, but I won't have time to do it for a couple of weeks and I am hoping an easier solution can be found without me having to drive, especially since if the problem is on my end, that trip would be a waste of time for both of us.

Free/busy information unavailable in Outlook 2013 on Windows 8.1 on Exchange 2010

Hi,
This has been discussed a lot inf forums but unfortunately having followed all the guides I have found, I can't resolve it. I am the only user with the issue.
I have primarily followed https://social.technet.microsoft.com/Forums/office/en-US/ee9e1b89-bea1-48aa-9008-cae205c5e816/forum-faq-why-cant-i-retrieve-freebusy-information?forum=outlook
including recreating my profile, installing http://support.microsoft.com/kb/2850061/en-us via
Ofifce 2013 SP1, verifiying the funtion works through OWA etc etc.
I have the full version of Office 2013 Pro not the Click to Run version. It seems to be the Outlook client itself not the Exchange server. I am at a loss what to do next... please help! :)

Hi,
Please also enable Automatic Replies in Outlook, check if this feature works well.
Since the issue only occurs to one client and it works on OWA, I suggest you try these steps below to troubleshoot the issue:
1. Start Outlook in Safe Mode. It is always a helpful method to troubleshoot Outlook client issues, when in Safe Mode, Outlook doesn't load with add-ins, we can check if this issue persists when add-ins are disabled:
Press Win + R, type "outlook.exe /safe" in the blank box, press Enter.
If there's no issue in Safe Mode that you can find free/busy information again, disable the suspicious add-ins to verify which one caused the problem.
2. Perform a clean boot. This helps determine whether the issue is related to some background programs, any 3rd-party programs will be disabled. If the issue doesn't occur in Clean Boot, then we may suspect it's related to some 3rd-party programs, the detailed
steps can be found in this link below:
http://support.microsoft.com/kb/929135
Regards,
Melon Chen
TechNet Community Support
It's recommended to download and install
Configuration Analyzer Tool (OffCAT), which is developed by Microsoft Support teams. Once the tool is installed, you can run it at any time to scan for hundreds of known issues in Office
programs.

Windows user - outlook - no free/busy info

Howdy,
So working with SL server. Thus far very happy with it, but running into one issue. I've got a windows user, that is using his iCal (calDave) calendar thru outlook. He is unable to see free/busy information, whereas my mac users can see it. Is this a configuration issue, or just a 'you can't get there from here' issue.
I can provide more information if it is needed.
ST

I did configure the outlook user to use the iCal service.
What I did was, login to the web server, login as the user (all of this done from end users windows machine), go to their calendar, hover over the calendar name in the upper left side of the page, and an italic 'i' will appear, click on that, and an info box for that ical account will appear. click on 'subscribe to ical' It should then give you the option of what app to open this in/for. Choose outlook. It should then give you a window of subscribe to calendar url. Now i'm not in front of a windows box right now, so am working from memory. I believe in outlook you subscribe to web calendar, and paste in the url, it should look something like this webcal://serverhostname.domainname.com:8008/calendars/_uids_/144BB4E3-35CB-4F1E-BEB9-2B20E4B6B139/calendar.
Now this should allow them to retrieve calendaring information to outlook. If you want them to push their free busy schedule back, I believe you select the account, and right click and select 'publish', that will push their availble schedule to the server.
Now this is all somewhat dependent on you having mail internal, you will have to jump thru some hoops for invite replies if you have externally support mail.
I may not have these steps in all the right order, and may have been inaccurate in my instructions, so if I am, query back and I'll try to step thru it when on a windoze host.

Change the default of Free/Busy for an event in Outlook 2010

Is it possible (as it was in old version) to set the Show As default for events?
Thanks

Hi,
The ‘Free/Busy’ information is used by the people who send Meeting requests, to determine whether a person is free or busy so that, they can know their availability status for Meetings. Below is a tutorial that will show you how to change the
Permissions for viewing a particular person’s Free/Busy information.
To change the Permissions for your Free/Busy Information, do the following
1) Click on the ‘File’ tab and then on the ‘Options’ tab.
2) In ‘Outlook Options’ window, click on the ‘Calendar’ tab.
3) Now inside the Calendar tab, under the ‘Calendar Options’ category, click on the ‘Free/Busy Options’ tab.
4) Now in the ‘Free/Busy Options’ window thus opened, you can choose to publish a certain number of Month’s calendars that contains your Free/Busy information and also change the time interval for updating your Free/Busy information.
5) You can also have your ‘Free/Busy’ information published on a particular Web location. To achieve this, select the checkbox that says ‘Publish at My location’ and in the space provided below, enter the specific location and click
on ‘OK’.
So, this is how you can change Permissions for viewing the Free/Busy information.
Sincerely

No Free/Busy Information for Exchange 2010 users in Outlook 2010 client, 2010 OWA shows this information fine

I have looked for hours and hours on Google and this web site for this type of issue and nothing seems to help.
Problem:
On my new Windows 2008 R2 /Exchange 2010 server with IIS7 installed, I can use Outlook 2010 client to login and send and receive e-mail but when I try to busy search internal Exchange users I get no information (cross-hatch), but the sender of the Meeting Request
can see their own free/busy information fine. And OWA users can see free/busy information fine, as can Outlook 2003 client users against this Exchange 2010 server when logged in.
I don't know if I have a certificate problem with regard to IIS7 or Exchange 2010, I did not create my own certificate , it is just what was installed by default when I installed and configured Win2K8 server, IIS7 and Exchange.
On the Windows 7 workstations with Outlook 2010 client, I am not logging into the Exchange 2010 server DNS domain, if that makes any difference. On these workstations I can ping "autodiscover.my.exchange.server.com" and my.exchange.server.com
with no problem. I even used this Microsoft KB to install a new _autodiscover dns entry, but it did not help :
When I turn on logging on my Outlook 2010 client, I see this in my C:\Users\Administrator\AppData\Local\Temp\1\outlook logging\20131208-135658864-fb.log :
2013/12/08 13:56:58.864: Getting ASURL
2013/12/08 13:56:58.864: URL returned from cached autodiscover: blah blah
2013/12/08 13:56:58.864: Request to URL:
2013/12/08 13:56:58.864: Request action:
2013/12/08 13:56:58.864: Request XML: <?xml version="1.0"?>
2013/12/08 13:56:59.051: Request sent
2013/12/08 13:56:59.051: Response error code: 00000000
2013/12/08 13:56:59.051: HTTP status code: 0
2013/12/08 13:56:59.051: -------------------------------
2013/12/08 13:56:59.051: There is an error in request/response.
2013/12/08 13:56:59.051: XML response:
2013/12/08 13:56:59.051: -------------------------------
2013/12/08 13:56:59.051: Getting ASURL
2013/12/08 13:56:59.644: Failed to get ASURL. Error 8004010F
At an Exchange shell console I enter this command and get these results :
Exchnage Management Shell :
VERBOSE: Connecting to BPExchange2010.my.exchange.server.com
VERBOSE: Connected to BPExchange2010.my.exchange.server.com.
[PS] C:\Windows\system32>Test-OutlookWebServices -id:[email protected] -TargetAddress:[email protected]
ll.com
RunspaceId : c929eacd-d53c-49d7-8532-c4b74e61b8be
Id : 1019
Type : Information
Message : A valid Autodiscover service connection point was found. The Autodiscover URL on this object is
Type : Success
Message : [Server] Successfully contacted the UM service at https://bpexchange2010.my.exchange.server.com/ews/exchan
ge.asmx. The elapsed time was 234 milliseconds.
[PS] C:\Windows\system32>
** Also frequently when I log into Outlook 2010 client and start to send a meeting request , I get the Security Alert dialog :
autodiscover.my.exchange.server.com
Information you exchange with this site cannot be viewed or changed by others. However, there is a problem with the site's security certificate.
Green Check Mark : The security cerficate is from a trusted certifying authority
Green Check Mark: The security certificate date is valid
Red X : The name on the security certificate is invalid or does not match the name of the site.
Do you want to proceed ? . I either import the certificate or click YES, but does not help this issue.
NOTE: Each user that shows as NO INFORMATION cross-hatch, these users have appointments and have logged into outlook before.
When I do this autodiscover url from a Windows 7 pc with outlook 2010 I get :
This XML file does not appear to have any style information associated with it. The document tree is shown below.
<Autodiscover xmlns="http://schemas.microsoft.com/exchange/autodiscover/responseschema/2006">
<Response>
<Error Time="14:47:01.5656198" Id="401440650">
<ErrorCode>600</ErrorCode>
<Message>Invalid Request</Message>
<DebugData/>
</Error>
</Response>
</Autodiscover>
Can anyone assist ? What am I missing ?
Thank You
NOTE: When will this go away. I had to strip out a lot of helpful information to post this. "Body text cannot contain images or links until we are able to verify your account."

Hi,
How many users encounter this issue, all users with Outlook 2010 or some specific users?
According to your post, the Error code 600 indicates that your Autodiscover service is working well. as for the certificate mismatch issue, we can also following the KB below to resolve it:
http://support.microsoft.com/kb/940726/en-us
The Free/Busy information in Exchange 2010 is using the Availability service to
retrieve it. Please directly access
https://mail.mydomain.ae/EWS/Exchange.asmx in IE and see whether a proper XML file is returned.
Or we can go to
https://testexchangeconnectivity.com and check MS Exchange Web Services Connectivity Tests.
Thanks,
Winnie Liang
TechNet Community Support

Outlook 2007 Clients Cannot Access Free/Busy Calendar info. for Exchange 2010 Mailbox

Hi:
I have Outlook 2007 clients that cannot access Free/Busy Calendar info. for Exchange 2010 mailboxes. They receive error like "...you do not have appropriate permissions..."
If those same users logon to a machine running Outlook 2010 then they can view the free/busy info. of the other user's mailbox, so I believe the permissions are set correctly on the mailbox to allow the viewing.
Any insights are greatly appreciated!
Thank you!
Bob Herman IT Tropolis

Hi Herman,
As you said, it seems users have proper permissions on mailbox.
Please make sure users has Reviewer permission on Outlook 2007.
Please try to run Outlook 2007 under safe mode or re-create profile.
Also try to turn Outlook 2007 to Exchange Online mode from Cached mode.
Thanks
Mavis Huang
TechNet Community Support

Exchange/Outlook 2013 No free/busy information could be retrieved

We are getting a problem for certain users where their Free/Busy info is not visible in the Scheduling Assistant.
HOWEVER - the same user's calendar can be viewed as a Shared Calendar without a problem.
I believe this has been working previously and has now stopped.
It is affecting Mac & PC user the same and is also apparent in OWA.
Please help as typically this is affecting our VIPs.
Thanks

Hi,
According to your description, I noticed that the free/busy information also couldn’t be retrieved in OWA. Please confirm your Exchange version and double check whether all users can’t use scheduling assistant to view free/busy information.
In Outlook client, please run Test E-mail AutoConfiguration tool to test the Autodiscover service and Availability service URL:
please open Outlook - press CTRL key - right click on the Outlook icon from right bottom corner taskbar - Test Email AutoConfiguration. Put your email address - uncheck use guessmart and secure guessmart authentication - click Test to check your Autodiscover
service.
In Results tab, please get the Availability service URL. Then access it in Internet Explorer in your local machine, and check whether a proper XML file can be returned.
Regards,
Winnie Liang
TechNet Community Support

OWA 2010 address book error retrieving free/busy information

Hi All
I get the following error when viewing a contacts free/busy information in the OWA 2010 address book.
Outlook 2010 clients cannot view contacts free/busy information either. There's a "not connected" error on the client.
This issue started after a service pack or update was applied. Which one I don't know as it was done by another admin.
Has anyone seen this error before or does anyone know what this error is pointing to?
Many Thanks
Roger
Request
Url:
https://remote.mydomain.com:443/owa/ev.owa?oeh=1&ns=ReadADOrgPerson&ev=LID
User: Test User
EX Address: /o=First Organization/ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=Test User7cc
SMTP Address: [email protected]
OWA version: 14.3.210.2
Mailbox server: SBS.mydomain.local
Exception
Exception type: System.NullReferenceException
Exception message: Object reference not set to an instance of an object.
Call stack
System.Diagnostics.SharedPerformanceCounter.GetCategoryData()
System.Diagnostics.SharedPerformanceCounter..ctor(String catName, String counterName, String instanceName, PerformanceCounterInstanceLifetime lifetime)
System.Diagnostics.PerformanceCounter.Initialize()
System.Diagnostics.PerformanceCounter.IncrementBy(Int64 value)
Microsoft.Exchange.Diagnostics.ExPerformanceCounter.IncrementBy(Int64 incrementValue)
Microsoft.Exchange.InfoWorker.Common.Availability.Query`1.ExecuteWithPerformanceMeasurement()
Microsoft.Exchange.InfoWorker.Common.Availability.ThreadContext.<>c__DisplayClass6`1.b__5()
Microsoft.Exchange.InfoWorker.Common.Availability.ThreadContext.Set(String label, ThreadCounter threadCounter, ClientContext clientContext, RequestLogger requestLogger, ExecuteDelegate executeDelegate)
Microsoft.Exchange.InfoWorker.Common.Availability.ThreadContext.Set[T](String label, ThreadCounter threadCounter, ClientContext clientContext, RequestLogger requestLogger, ExecuteDelegate`1 executeDelegate)
Microsoft.Exchange.InfoWorker.Common.Availability.Query`1.Execute()
Microsoft.Exchange.Clients.Owa.Core.Utilities.ExecuteAvailabilityQuery(OwaContext owaContext, AvailabilityQuery query, Boolean expectFreeBusyResults, Boolean expectMergedFreeBusyResults, AvailabilityQueryResult& result)
Microsoft.Exchange.Clients.Owa.Premium.ReadADOrgPerson.GetFreeBusy(OwaContext owaContext, String recipientPrimarySmtpAddress, ExDateTime startDate, ExDateTime endDate, HttpContext httpContext, String& allDayFreeBusy, String& workingHoursFreeBusy, String&
oofMessage)
Microsoft.Exchange.Clients.Owa.Premium.ReadADOrgPersonEventHandler.RenderFreeBusyData(String smtpAddress, ExDateTime startDate, ExDateTime endDate, Boolean renderOof)
Microsoft.Exchange.Clients.Owa.Premium.ReadADOrgPersonEventHandler.LoadInitialData()

Free/busy data and the offline address book are two separate services.
Free/busy uses Exchange Web Services (EWS). The offline address book uses a different web service connecting to the OAB virtual directory.
Are you using SBS? SBS does some things differently so I recommend that you post this in the SBS Forum:
http://social.technet.microsoft.com/Forums/en/smallbusinessserver/threads
Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."

[Forum FAQ] Why can't I retrieve Free/Busy information

Free/Busy information is a feature of Microsoft Outlook that allows you to see when others are free or busy so that you can efficiently schedule meetings. You can use Microsoft Outlook to publish Free/Busy information to any server
your and your coworkers have read/write access to. However, in some cases you’ll notice that you can’t retrieve Free/Busy information correctly from Outlook. You can try the below methods to troubleshoot and get the Free/Busy information again.
Since most users who often use this feature are using Exchange, all the information in this content is only based on Exchange.
General troubleshooting methods:
Method 1: Start Outlook using the ‘/cleanfreebusy’ command line switch
Method 2: Logon OWA to see if the Free/Busy information shows correctly
Method 3: Check the user’s Permission Level when only one user’s Free/Busy information can’t be displayed
Other causes
Autodiscover has not been setup correctly
Updates
Here are the detailed steps and explanation of each method and cause.
Method 1: Start Outlook using the ‘/cleanfreebusy’ command line switch
With the ‘/cleanfreebusy’ switch, it will clear and regenerate free/busy information when Outlook starts, sometimes this process fixes the problem that Free/Busy information doesn’t display correctly, and this is always the first thing we should try when
we can’t get the Free/Busy information from Outlook.
This switch can only be used when you are able to connect to your Microsoft Exchange server.
To start Outlook using the switch, we can press Win Key +
R to start Run, type ‘outlook.exe /cleanfreebusy’ in the blank box, then press
Enter.
Please note since Outlook 2013 only uses the availability service which is connected to Autodiscover, the command line switch ‘/cleanfreebusy’ has been removed as well as the associated code so that Outlook 2013 will not recognize this
command.
Method 2: Logon OWA to see if the Free/Busy information shows correctly
If you are using Cached Exchange Mode in Outlook and having trouble getting the Free/Busy information, please logon OWA, or switch to Online Mode to see if the Free/Busy information shows correctly.
If the Free/Busy information shows correctly on OWA or in Online Mode, this problem may be caused by the Outlook Data File(.ost) corruption, which leads to the sync failure. Therefore we should exist Outlook, browse to the Data File and rename it to “.old”.
The next time Outlook starts, it will regenerate a Data File to sync and we can check if the Free/Busy information can be retrieved.
The location of the Data File can be found from File tab ->
Account Settings -> Account Settings ->
Data Files tab. (Outlook 2010 and Outlook 2013)
Or Tools menu -> Options ->
Mail Setup tab -> E-mail Account -> Account Settings window ->
Data Files tab. (Outlook 2007)
If on OWA it displays fine but doesn’t show the information correctly in neither Cached Exchange Mode nor Online Mode, it may be caused by the firewall or anti-virus settings, disable them to verify if they caused the problem.
Method 3: Check the user’s Permission Level when only one user’s Free/Busy information can’t be displayed
When a user has set his Calendar Permission to None, other people will not be able to see his Free/Busy information. When we notice that we can get most people’s Free/Busy information but fail to get one specific person’s, please consider
to check his Calendar Permission:
In that user’s Outlook, right click on his default Calendar, click Properties, select
Permissions tab.
We need to at least switch the Permission to Free/Busy time to get his Free/Busy information correctly.
Other cause 1: Autodiscover has not been setup correctly
From Outlook 2007, Outlook uses Autodiscover to get the Free/Busy information. Once Autodiscover has not been configured properly, the Free/Busy information may not display correctly. If you are also seeing issues with Out of Office assistant, we may assume
that you haven’t correctly setup Autodiscover, since these two symptoms are common when Autodiscover is not configured correctly.
To verify that, please test Outlook Autodiscover Connectivity:
http://technet.microsoft.com/en-us/library/bb123573.aspx
We can also learn Configure Exchange Services for the Autodiscover Service from:
http://technet.microsoft.com/en-us/library/bb201695.aspx
Since Autodiscover Service is more Exchange related, we need to seek Exchange support and post the question in Exchange forum:
http://social.technet.microsoft.com/Forums/exchange/en-US/home?category=exchangeserver
Other cause 2: Updates
Although Updates from Microsoft do no harm to the system for most of the time, the updates sometimes can mess things up.
Outlook 2013 November 2013 security update once became the culprit that caused some users not able to retrieve Free/Busy information from calendar scheduling. This occurs because Autodiscover fails for Exchange 2007 configurations. So in fact, this also
refers to the previous reason, Autodiscover is corrupted.
The fix for the issue above has been released:
http://support.microsoft.com/kb/2850061/en-us
Once you have some issues after updating and doubt it’s an update issue, you can always come to our forum to ask if there’s a recent update which causes the problem, we will be happy to support you. If a fix hasn’t been released yet, we suggest you uninstall
the suspicious ones from Control Panel -> Programs and Features ->
View installed updates to verify which caused the problem, also as a workaround.
Summary
The reason that we can’t get the correct Free/Busy information can vary. If you find it doesn’t work even after several general troubleshooting steps, please consider it’s Autodiscover related. For anyone who comes up against the issue that Free/Busy information
can’t be retrieved, please feel free to visit Outlook IT Pro Discussions from the URL:
http://social.technet.microsoft.com/Forums/office/en-US/home?forum=outlook, we will be glad to help you.
Please click to vote if the post helps you. This can be beneficial to other community members reading the thread.

You should be charged, but that confirms the account. Same behavior with the app store...have to give login info evem for free downloads.

Free/Busy availability and Out of Office not working after Exchange 2003 to Exchange 2010

We just migrated from Exchange 2003 to Exchange 2010 as an intermediate step before we get to Exchange 2013. I want to make sure everything is working OK before we start the migration to Exchange 2013.
The users have Outlook 2010, and there are 2 issues. They can't view free/busy times for other people using the scheduling assistant, and they can't set their Out of Office messages. If they go in through Outlook Web Access, then these features
work!
I've searched the forums, and I see a few similar issues, but I don't think this is related to the .Net issue on the CAS server.
Any suggestions?
Thanks!
--Kent

Hi Kent,
Try checking the free busy info Outlook 2010 with running /cleanfreebusy switch
Check the Free/Busy System Public Folder and pointed out to the correct server on each mailbox DB in Exchange 2010
Find the public folder replica database
get-publicfolder -Identity "\NON_IPM_SUBTREE\SCHEDULE+ FREE BUSY" -Recurse | fl name,Replicas
In E2k10 check if the exchange 2003 is added in the replica list. If not try adding them and check.
force Public folder content replication.
Please mark as helpful if you find my contribution useful or as an answer if it does answer your question.
That will encourage me - and others - to take time out to help you.
Regards,
Sathish

User can't see any free/busy - on one PC only.

Hello,
I have one single user who cannot see the free/buy info of any other user from his normal desktop PC using Outlook 2010.
If he uses Outlook Web App on the PC, it works perfectly.
And if he uses Outlook 2010 on another PC (on a different network sub-net), it works perfectly.
What network dependencies does the free/busy info have please?
Exchange 2010 with Outlook 2010.
Thanks,
- Alan.
(Also posted to Outlook IT Pro forum.)

Hi,
As we know Availability service is responsible to fetch the free/busy details in outlook 2010 where Exchange 2010 is installed.
I suggest to enable Logging of Availability Service, then post the result of log file so that we could dig this issue further:-
How to Enable Logging of Availability Service:-
Start Outlook.
On the
File tab, click Options.
In the
Outlook Options dialog box, click Advanced.
In the
Other section, click to select the Enable troubleshooting logging (requires restarting Outlook) check box, and then click
OK.
Restart Outlook
When Outlook uses the Availability Service to retrieve free/busy information [Try to fetch free/busy for other users to simulate the issue],
log files are generated in the following folders:
%temp%\OLKAS
The file name of the log files uses the following format:
yyyymmdd-hhmmssss-AS.log
For example, a log file that is generated on March 30, 2010 at 2:14:20.0029 P.M. will be named:
20100330-1411200029-AS.log
Post result of this log.
Regards, Sourabh Kumar Jha

Federated free busy information - the recipients mailbox server could not be contacted

Hi guys, really hoping someone can help with a free busy issue I'm having.
I've configured a new forest with exchange 2013 installed in preparation for moving all AD objects to the newly created forest to resolve a single label domain issue. The source forest has exchange 2010 SP2 installed. I've setup a trust between
the forests and dns is resolving okay. Federation has been setup for each of the forests and sharing configured but free busy info isn't available. When trying to retrieve FB from the new exchange 2013 mailboxes i get "the recipients mailbox
server could not be contacted" Trying to lookup FB from new forest to source "the recipients server could not be contacted" I've followed the troubleshooting steps in the following link: http://johanveldhuis.nl/en/troubleshooting-federared-sharing/
which are all okay except when I run Test-FederationTrust -UserIdentity [email protected] On the exchange 2013 forest all tests are successful, on the exchange 2010 forest all tests are successful with the exception of token request which
returns: failed to request validation token. Any help on this really appreciated

Just check the application log again and found this:
Process 5660: ProxyWebRequest FederatedCrossForest from S-1-5-21-672479773-2712238020-2201217990-2314 to
https://mail.contoso.com/ews/exchange.asmx/WSSecurity failed. Caller SIDs: WSSecurity. The exception returned is Microsoft.Exchange.InfoWorker.Common.Availability.ProxyWebRequestProcessingException:
System.Net.WebException: The request failed with HTTP status 401: Unauthorized.
   at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.EndInvoke(IAsyncResult asyncResult)
   at Microsoft.Exchange.InfoWorker.Common.Availability.Proxy.Service.EndGetUserAvailability(IAsyncResult asyncResult)
   at Microsoft.Exchange.InfoWorker.Common.Availability.FreeBusyApplication.EndProxyWebRequest(ProxyWebRequest proxyWebRequest, QueryList queryList, Service service, IAsyncResult asyncResult)
   at Microsoft.Exchange.InfoWorker.Common.Availability.ProxyWebRequest.EndInvoke(IAsyncResult asyncResult)
   at Microsoft.Exchange.InfoWorker.Common.Availability.AsyncWebRequest.EndInvokeWithErrorHandling():. The request information is ProxyWebRequest type = FederatedCrossForest, url =
https://mail.contoso.com/ews/exchange.asmx/WSSecurity
Mailbox list = <<a href="mailto:[email protected]>SMTP:[email protected]">[email protected]>SMTP:[email protected], Parameters: windowStart = 27/01/2014 00:00:00, windowEnd = 10/03/2014 00:00:00, MergedFBInterval = 30, RequestedView = MergedOnly
. ---> System.Net.WebException: The request failed with HTTP status 401: Unauthorized.
   at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.EndInvoke(IAsyncResult asyncResult)
   at Microsoft.Exchange.InfoWorker.Common.Availability.Proxy.Service.EndGetUserAvailability(IAsyncResult asyncResult)
   at Microsoft.Exchange.InfoWorker.Common.Availability.FreeBusyApplication.EndProxyWebRequest(ProxyWebRequest proxyWebRequest, QueryList queryList, Service service, IAsyncResult asyncResult)
   at Microsoft.Exchange.InfoWorker.Common.Availability.ProxyWebRequest.EndInvoke(IAsyncResult asyncResult)
   at Microsoft.Exchange.InfoWorker.Common.Availability.AsyncWebRequest.EndInvokeWithErrorHandling()
   --- End of inner exception stack trace ---
. Name of the server where exception originated: "MailServer". Make sure that the Active Directory site/forest that contain the user's mailbox has at least one local Exchange 2010 server running the Availability service. Turn up logging for the Availability
service and test basic network connectivity.

Check Availability does not display free busy information

I have setup Calendar Server and Communications Express (w/ Directory Server, Access Manager, Delegated Administrator, Web Server) to do an evalutation of the Sun Calendar. I started with the 2005Q4 version as it came with our Solaris 10 installation.
Then, when I was unable to view free/busy information via the Check Availability view, I thought that maybe trying out the upgraded version 6.3 would help. I have the exact same problem with 6.3 as I did with 2005Q4. All the other basic capabilities seem to be working fine.
I should note that when I setup 2005Q4, the free/busy information showed up in Calendar Express, but not Communications Express.
With 6.3, the logs indicate that Calendar Server is sending the free/busy information, and that Communications Express is receiving the free/busy information from Calendar Server, yet all the time slots were showing that the resources I was checking were available, when I know full well that they have busy time slots (which show up on their respective calendars), and the Communications Express logs received those free/busy times from calendar server. I set the time range of the check availability request wide enough to ensure that I should see the busy time slots.
I am completely baffled by this as this is such a major feature (at least for us)--I wouldn't think that this would be a problem across two major releases without anyone else noticing. What could I be doing wrong?
I am using the calmaster account to do this, and I added a couple of resources using delegated administrator. Events show up on the resource calendars as expected. Communications Express receives the correct free/busy information from Calendar Server, but does not display it.

Everything is in one domain right now (I am just trying to get a simple case working).
When I look at the resource calendar itself (logged is as the owner, which is calmaster), I can see everything about all events on the reosurce calendar.
The default acl for resource calendars is the same one that comes by default with Calendar Server (which grants all users permissions to see free/busy info).
When I edit the resource calendar in Communications Express, "Anyone can view my availability", "Anyone can read my calendar", and "Anyone can invite me to an event" are all enabled, yet the availability does not show busy in the time slots where the resource has scheduled events on its calendar--everything remains as available (white).
The events for which the resource is scheduled are public events.
Any other ideas?
Thank you for replying--any other suggestions or ideas that you or anyone else can think of are more than welcome. I really need to get this working!
Colette

Free/Busy Info Unavailable in OWA & Outlook

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