Exchange 2010 EMC and EMS errors - BLOCKED by software restriction

EMC has this message:
Initialization failed "Execution calling 'GetSteppablePipeline" with "1" arguement: File D:\program files\Microsoft\Exchange Server\V14\RemoteScripts\ConsoleInitialize.ps1 cannot be loaded because its execution is blocked
by software restriction policies" 
EMS has this error:
"There were errors in loading the format data file: D:\Program Files\Microsoft\Exchange 2010\V14\Bin\exchange.format.ps1x
ml, , D:\Program Files\Microsoft\Exchange 2010\V14\Bin\exchange.format.ps1xml : File skipped because of the following validation exception: File D:\Program Files\Microsoft\Exchange 2010\V14\Bin\exchange.format.ps1xml cannot be loaded because its execution is
blocked by software restriction policies. For more information, contact your system administrator."
All other powershell scripts work just fine.  It is not the execution policy.  That is set properly.  Authenticode returns valid on the files. There are no settings it GPO to control or cause this. Email working fine.  It just started
after a reboot for updates.  Any other thoughts before I spend $500 for a call?
Server2008 Standard SP2
Update Rollup 4 v2 for Exchange Server 2010 SP2
Thank you

The long and short of it was Microsoft Certificates didn't update and were expired. I was not given a reason why this happened but the final solution after Microsoft spent 2 weeks on this was to first reinstall Exchange Service Pack 3, reboot. Install
update rollup 8, and reboot.  This fixed the EMC but not the shell.  Then they reinstalled the rollup 8 again and one more reboot.  Everything now works.  I'd say with all the other little tweaks they looked at as possible suspect and "other
things" they fixed in their efforts to solve this, I defiantly got my money's worth.  Despite not really knowing what really caused the issue in the first place

Similar Messages

  • Exchange 2010 EMC Failed Initialization

    Hi
    Server 2008 64bit SP2 running on hyper V
    Just done an install of exch2010 on a vanilla test DC 2008,  passed all the readiness checks after installing all the bits and pieces. I also ran the following:
    1) winrm quickconfig
    2) For a server that will have the typical installation of Client Access, Hub Transport, and the Mailbox role:
    sc config NetTcpPortSharing start= auto
    ServerManagerCmd -ip Exchange-Typical.xml -Restart
    all seemed to install OK but when I try and start the EMC when clicking on the "Microsoft Exchange ON-Premises" I get an initialization failure with the following detail:
    The following error occured when searching for On-Premises exchange server:
    [testdc08.company.com] Connecting to remote server failed with the following message : The WSMan client
    cannot process the request. Proxy is not supported under http transport. Change the transport to https and
    specify valid proxy information and try again. For more information , see the about troubleshooting help topic
    I understand this stuff is to do with remote managing exchange servers across the internet, but in my case I am trying to simply access the exchange server (on the DC) from the DC??? 
    Can anyone shed light on this install of doom,
    thanks

    Dear All,
    I have faced same issue with my exchange 2010 server on Windows 2008 R2 O/S. There is some problem in my winhttp settings (proxyycfg). To resolve this issue I deleted WinHttpSettings from registry keys. It will reset it to default. Below is the key:
    HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\WinHttpSettings
    -->Delete WinHttpSettings
    Regards,
    Khurram Awal Khan
    Senior System Engineer
    Alnafitha Int.
    Hi Khurram
    This worked for use as well.  Thank you

  • Exchange 2010 sp3 and WSUS

    I have a DAG environment with Exchange 2010.  last week I moved from sp2 RU6 to sp3 rtm. I then manually installed RU6 for sp3. the correct verison numbers are being displayed in the EMC under Help>About Exchange Server 2010 (it shows version 14.03.0195.001) I
    verified the version numbers on this site -
    http://social.technet.microsoft.com/wiki/contents/articles/240.exchange-server-and-update-rollups-build-numbers.aspx
    My question is, in WSUS, it shows that all my servers with exchange on  them, (a management server with the EMC only, 2 exchange servers for the DB, a CAS server and a DR exchange server) need SP3 RU2. 
    1) Will this disrupt the current SP3 RU6 installation?
    2) Would it be better to just decline the SP3 RU2 update in WSUS? 
    3)Should I just proceed with the installation and see what happens?
    If I am on the wrong forum, please let me know.
    thanks
    Ian 
    Ian

    Hi
    I prefer doing rollups by downloading the file and installing it on the server from an elevated prompt. 
    Deploying it with WSUS always leaves room for error.
    Rather manually download the file and plan the installation.
    Hope this helps. Please remember to click “Mark as Answer” on the post that helps you, and to click “Unmark as Answer” if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

  • Exchange 2010 DAG and NIC Teaming | Team broke and now cluster doesn't see the box

    Hello everyone,
    Question for the group. We are running an Exchange 2010 DAG cluster with four boxes with active/passive DB's on each of the four boxes. We run HP boxes for Exchange and the NIC's are teamed. Now mind you, I arrived at this company well after this environment
    was set up so I have inherited everything here.
    What has happened is one of the four boxes had an issue after an otherwise normal reboot. We could no longer ping it. Logged into the ILO and was able to log into the server, only to discover its team NIC was messed up and our only option was to rebuild
    the team NIC. So I rebuilt the team and gave it the original IP/subnet/gateway it had. The server reboots and we can ping it.
    However, when I look in the EMC at Database Management, all the passive copies that were on that DB are showing Failed. Ok, so I suspend the copy and attempt to reseed. No luck. I get the error "The NetworkManager has not yet been initialized"
    and it references my machine which had the bad team NIC. Curious, I go look at my Failover Cluster Manager.
    Looking at the fail over cluster manager, I notice a X on the cluster and I am showing my server which had the bad team NIC being listed as down. I attempted to start the cluster service for the machine, but it did not work.
    Is there something I a missing? What are my exact steps to take to get my cluster configuration working correctly again and see my box? Do I need to remove the box from the DAG, evict it from the cluster, and rejoin it again? If so, can I do this without
    affecting the other three machines so users don't notice any outage?
    Thanks for any help you can give!

    Hi Kyle,
    I am Chetan Savade from Symantec Technical Support Team & sorry to know the problem you faced because of SEP.
    Symantec recommends that the Exchange server's OS always be protected by the latest available release of SEP.  The Exchange server's message flow and Information Store must be protected by a dedicated mail security product, such as Symantec
    Mail Security for Microsoft Exchange. 
    For cluster environment I would recommend to follow this article:
    Installing the Symantec Endpoint Protection client to a Windows cluster server
    http://www.symantec.com/docs/TECH91154
    Installation best practices for Endpoint Protection on Windows servers
    http://www.symantec.com/docs/TECH91154
    Best Regards,
    Chetan

  • Exchange 2010 cross subnet Dag - Errors creating DB copies in DR site

    We are running exchange 2010 standard edition in our main site with 2 mailbox servers in a DAG. I've added 2 more mailbox servers in a DR site connecting over a 20Mb fiber connection. I've tried adding one of the DR mailbox servers over to the DAG as database
    server, also tried updating copies of the database after it fails to update it.  Been working with Microsoft support on this but they have been little slow getting back with me so wanted to see if I can find anyone that has had this issue before. We've
    changed TCP global settings, they've set the Cluster setting for samesubnet and crosssubnet threshholds settings to recommended, made sure my DAG replication networks were correct and that's about it so far.  Tried running the update database
    from GUI and shell but to no avail.  Seems like it is copying the logs and database but fails at the very end.  We thought it might be backup software running so we turned that off completely.  Here are the different error messages I get..
     A source-side operation failed while performing seed operation.  error occurred whil communicating with mbx-01 (source server..)  unable to read data from transport connection..  connected host failed to respond..
    A source side operation failed performing seed operation.  An I/O error occurred while attempting to access file ..CatalogData-...ci on source server could not be opened. sys cannot find file.
    Information Store (1988) Mailbox-MBX-01:  The internal database copy (for seeding or analysis purposes) has been stopped because it was halted by the client or because the connection with the client failed.
    Any help is appreciated..
    Michael Duhon

    Hello,
    I recommend you try to restart Microsoft Exchange Replication Service to check the result.
    If the issue persists, please try to rebuild the Index for your database to check the result.
    If you have any feedback on our support, please click
    here
    Cara Chen
    TechNet Community Support

  • Exchange 2010 EWS - app_global.asax-error.

    Im setting up an Exchange Online deployment on a costumers server enviroment. They have a single Exchange 2010 SP3 with Rollup 6 installed.
    The users started complaining that they couldnt set out-of-office messages in Outlook, and that they were prompted for Exchange password in Lync repeatedly.
    Now, im not sure if these errors came because of the Hybrid setup of its a coincidence, but here is what Ive done:
    I started the Hybrid Wizard, but this one got some errors, so it didnt complete on the first run. The error was the following:
    http://support.microsoft.com/kb/2626696
    and I ran
    ServiceModelReg.exe –r
    on the server to fix it. This solved this problem, but a new one occurred with publishing of Autodiscover and EWS online. I called it a day, and was busy the next day so this was left like this for a few days.
    The next day a few users complained that they couldnt set out of office. The next day after that, the lync error occured (there was a reboot that night. Im not sure if thats relevat). The errors in the Hybrid-wizard had then been solved, and the Hybrid-wizard
    ran through, but the EWS-problem remained. 
    Now, on the server I get this error every second or so:
    +
    System
    Provider
    [ Name]
    System.ServiceModel 3.0.0.0
    EventID
    3
    [ Qualifiers]
    49154
    Level
    2
    Task
    5
    Keywords
    0x80000000000000
    TimeCreated
    [ SystemTime]
    2014-09-25T15:36:32.000000000Z
    EventRecordID
    933734
    Channel
    Application
    Computer
    <Server Name>
    Security
    [ UserID]
    S-1-5-18
    EventData
    System.ServiceModel.ServiceHostingEnvironment+HostingManager/20974680
    System.ServiceModel.ServiceActivationException: The service '/EWS/Exchange.asmx' cannot be activated due to an exception during compilation. The exception message is: Could not load file or assembly 'App_global.asax.hid_mutt,
    Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified.. ---> System.IO.FileNotFoundException: Could not load file or assembly 'App_global.asax.hid_mutt, Version=0.0.0.0, Culture=neutral,
    PublicKeyToken=null' or one of its dependencies. The system cannot find the file specified. File name: 'App_global.asax.hid_mutt, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null' at System.Reflection.Assembly._nLoad(AssemblyName fileName, String codeBase,
    Evidence assemblySecurity, Assembly locationHint, StackCrawlMark& stackMark, Boolean throwOnFileNotFound, Boolean forIntrospection) at System.Reflection.Assembly.InternalLoad(AssemblyName assemblyRef, Evidence assemblySecurity, StackCrawlMark& stackMark,
    Boolean forIntrospection) at System.Reflection.Assembly.InternalLoad(String assemblyString, Evidence assemblySecurity, StackCrawlMark& stackMark, Boolean forIntrospection) at System.Reflection.Assembly.Load(String assemblyString) at System.ServiceModel.Activation.ServiceHostFactory.CreateServiceHost(String
    constructorString, Uri[] baseAddresses) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.CreateService(String normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.HostingManager.ActivateService(String normalizedVirtualPath)
    at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String normalizedVirtualPath) WRN: Assembly binding logging is turned OFF. To enable assembly bind failure logging, set the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]
    (DWORD) to 1. Note: There is some performance penalty associated with assembly bind failure logging. To turn this feature off, remove the registry value [HKLM\Software\Microsoft\Fusion!EnableLog]. --- End of inner exception stack trace --- at System.ServiceModel.ServiceHostingEnvironment.HostingManager.EnsureServiceAvailable(String
    normalizedVirtualPath) at System.ServiceModel.ServiceHostingEnvironment.EnsureServiceAvailableFast(String relativeVirtualPath)
    w3wp
    4440
    Any ideas is appreciated. 

    Hi,
    I am glad to hear that issue solved by yourself.
    Event 3 indicated that Exchange missed Anonymous authentication on autodiscover/EWS Virtual directories.
    To solve this issue, please enable Anonymous authentication on autodiscover/EWS Virtual directories through IIS manager by the following steps:
    Open IIS manager.
    Navigate to Sites>Default Web Site>Autodiscover.
    Refer to the following picture to choose Authentication, then double-click it. Try to enable Anonymous Authentication.
    Repeat steps 1-3 to enable Anonymous authentication on EWS.
    Best Regards.

  • Calendar Sharing between 2 organisation Exchange 2010 SP3 and Exchange online with Federation Trust.

    Hi...
     Our company is running Exchange Server 2010 SP3 Standart would like to have Shared calendar with organisation running with Exchange online.
     We made a Federation trust between organisations and I checked that one certificate was installed and the rule for their domain was created. but when I try to share my calendar I always receive.
    "Calendar sharing is not available with the following contacts because of permission settings on your network."
    Name I took from GAL or input manually and always same. Forgot to mention that we migrated from Exchange 2003 to 2010 SP3 and all old exchange servers I removed. I tried everything that I know and read and nothing helped.
    Hope for your support.
    Thank you.

    1)I deleted everything and made step by step as indicated in your articles.
    2) recreated organisation relationship:
    RunspaceId            : xxxxxxxxxx
    DomainNames           : {xxxxxxx.microsoftonline.com, xxxxxxxxx.onmicrosoft.com, xxxxxxx.com}
    FreeBusyAccessEnabled : True
    FreeBusyAccessLevel   : LimitedDetails
    FreeBusyAccessScope   :
    MailboxMoveEnabled    : False
    DeliveryReportEnabled : False
    MailTipsAccessEnabled : False
    MailTipsAccessLevel   : None
    MailTipsAccessScope   :
    TargetApplicationUri  : outlook.com
    TargetSharingEpr      :
    TargetOwaURL          :
    TargetAutodiscoverEpr : https://pod12312.outlook.com/autodiscover/autodiscover.svc/WSSecurity
    OrganizationContact   :
    Enabled               : True
    ArchiveAccessEnabled  : False
    AdminDisplayName      :
    ExchangeVersion       : 0.10 (14.0.100.0)
    Name                  : xxx
    DistinguishedName     : CN=xxx,CN=Federation,CN=uxx,CN=Microsoft Exchange,CN=Services,CN=Configuration,DC=uxxx,DC=com
    Identity              : Lxx
    Guid                  : a8xxx
    ObjectCategory        : upxxs.com/Configuration/Schema/ms-Exch-Fed-Sharing-Relationship
    ObjectClass           : {top, msExchFedSharingRelationship}
    WhenChanged           : 27/01/2015 3:23:47 PM
    WhenCreated           : 26/01/2015 9:41:39 AM
    WhenChangedUTC        : 27/01/2015 8:23:47 PM
    WhenCreatedUTC        : 26/01/2015 2:41:39 PM
    OrganizationId        :
    OriginatingServer     : xxx.upxxxns.com
    IsValid               : True
    3. Configured Sharing Policies:
    [PS] C:\Windows\system32>Get-SharingPolicy
    Name                      Domains                                  Enabled    Default
    Default Sharing Policy    {*:CalendarSharingFreeBusySimple}        True       False
    Lxxx                              {lxxx.com:CalendarSharingFreeBusy...     True       True
    added my mail box to sharing policy but in the end receive same error 
    Calendar sharing is not available with the following contacts because of permission settings on your network.
    In EventViewer everything seems to be fine....
    No errors on policy creation... How can be checked this permission
    settings on your network they are on exchange on in DC ? 

  • Updated: Event ID 1006 - Can not delete Mails in OWA after installing SP1 (Exchange 2010) = Outlook and OWA Light are OK

    Hi all,
    4 Exchange Servers (2 DB + 2 CAS NLB Cluster) all Exchange 2010 SP1
    Outlook work fine.
    If I delete a message in OWA i became the following errors:
    Internet Explorer:
    Die Netzwerkverbindung ist nicht verfügbar. Wenn das Problem weiterhin auftritt, wenden Sie sich mit folgendem HTTP-Statuscode an den Helpdesk: 0.
    Translation: The networkconnection is not available. If it happens again, contact the helpdesk with HTTP statuscode 0
    Firefox:
    Die Netzwerkverbindung ist nicht verfügbar. Wenn das Problem weiterhin auftritt, wenden Sie sich mit folgendem HTTP-Statuscode an den Helpdesk: 302.
    Translation: The networkconnection is not available. If it happens again, contact the helpdesk with HTTP statuscode 302
    Event ID 1006 MSExchange Mailbox Replication
    Fehler: MapiExceptionNetworkError: Unable to make connection to the server. (hr=0x80040115, ec=-2147221227)
    Before SP1 it worked fine.
    Can somebody help me ?
    Kind regards Andy

    Hi,
    First, I would like to confirm the following questions:
    1. Does the issue occur on certain user mailbox via OWA or each user mailbox?
    2. Which OWA folder’s email cannot be deleted, Inbox, Sent Items or each folder?
    3. Which version of operating system is installed on the client machine, Windows XP, Windows Vista or Windows 7?
    At this stage, I suggest you temporarily disable firewall and anti-spam for a test. If the emails still cannot be removed via OWA, please refer to the following article
    and use isinteg tool to check and repair Information Store.
    Description of the Isinteg utility
    Thanks.
    Novak Wu-MSFT

  • Integration b/w Exchange 2010 SP2 and Exchange 9.1.1.7 connector

    Has any succesfully integrated exchange 2010 sp2 with 9.1.1.7 conncetor ..
    Sp2 is not in the certifcation list in the connector documentation .. just want to check if any one has done this before ..
    Thanks

    Hi Sembee,
    We did this already.
    We got it working now after doing above but with the shell.
    First we confirmed if the mailbox is disabled with the following command: Get-MailboxStatistics -Database MBD01 | Where { $_.DisconnectReason -eq "Disabled" } | Format-List LegacyDN, DisplayName, MailboxGUID, DisconnectReason
    It did show as disabled but when we try to enable it we got the following: This task does not support recipients of this type.
    So we disabled the mailbox in the shell, enable it again and it was fine.
    Get-MailboxStatistics -Database MBD01 | Where { $_.DisconnectReason -eq "Disabled" } | Format-List LegacyDN, DisplayName, MailboxGUID, DisconnectReason helped us, cause in the EMC exchange showed the user as enabled.
    Thanks

  • EXCHANGE 2010 (cfexchange and IMAP)

    First, let me say that I would have loved if this post was about how I was working with cfexchange and Exchange Server 2010, but its not, because cfexchange does not work with Exchange 2010 and never has.  See Bug report 82576 and vote!
    Now, since I was not able to use cfexchange, I wrote an email parsing script using CFIMAP that was working until recently.  About the same time, I upgraded Exchange to SP1, I also upgraded CF9 to CF9.01.  Now, I am unable to use the GETHEADERSONLY or GETALL actions of CFIMAP.  I consistently get the following error:
    The cause of this exception was: javax.mail.MessagingException: Unable to load BODYSTRUCTURE.
    Does anyone else have a similar environment to test to see if CF9 or 9.01 works with CFIMAP on Exchange 2010 SP1?  Your input would be much appreciated.
    --Sean

    I know this is an old question, but perhaps this will help someone else down the line...  I've run into this problem when accessing GMail using CFIMAP.
    The problem is caused by messages that have other messages attached as files.  In GMail, these get converted to "noname.eml" attachments that can only be opened if you download them.
    You can confirm this by quarantining all of the inbox files in a separate folder, moving only a couple known-attachment-free messages into the inbox and re-running your script. 
    Once you remove all messages that have other messages attached, you should have no more trouble

  • Problem with Exchange 2010, Q10 and attachment

    Q10 & Exchange 2010; unable to download and forward attachment
    Hi all,
    i have a problem with Q10 phone, sync with Exchange 2010 with activesync (not BES) all seem ok but unable to download attach.
    When press "download" didnt start. Unable also to forward same message but i think is a chainde problem.
    Same message from desktop (outlook) or OWA is ok and attach downloadable.
    This is the only Q10 present in company for test so i cannot compare to others BB.
    All other users connected to the exchaneg server have iphone & ipad no issue result. Email service seem ok also for desktop.
    Firmware was updateted about 10 day ago.
    Any idea for me?
    Thanks

    Hi marcottt,
    Could you provide more detail please so I can better assist?
    Do you have this issue with all attachment types? If not, what type of attachment are you having this issue with and what size is the attachment?
    What happens when you try to forward the message? Is any error received?
    Does removing and re-adding the email account make any difference?
    I look forward to your response.
    -FS
    Come follow your BlackBerry Technical Team on Twitter! @BlackBerryHelp
    Be sure to click Kudos! for those who have helped you.
    Click Solution? for posts that have solved your issue(s)!

  • Rollup 8 for Exchange 2010 SP2 causes EWS error with bad parameter for Exchange.MailboxReplicationService.ProxyService

    When I installed Rollup 8  for Exchange 2010 SP2 it caused an error in EWS
    EWS failed with the error:
    exchange web service could not load file or assembly Exchange.MailboxReplicationService.ProxyService bad parameter
    When I uninstalled the rollup all worked fine again.
    Any ideas, Thanks in advance?

    Hi,
    To apply this update rollup, you must have Exchange Server 2010 SP2 installed. And remove all interim updates for Exchange Server 2010 SP2 before you apply this update rollup. Please check your installation deployment by the following article:
    Install the Latest Update Rollup for Exchange 2010
    http://technet.microsoft.com/en-us/library/ff637981.aspx
    Description of Update Rollup 8 for Exchange Server 2010 Service Pack 2
    http://support.microsoft.com/kb/2903903/en-us
    If all requirements and preparations are configured properly, please collect your error logs to check your installation. It would be helpful to post some event logs here for further analysis.
    Thanks,
    Winnie Liang
    TechNet Community Support

  • Multiple OWA & ECP Virtual Directories on Exchange 2010 - 500 internal server error

    hello folks,
    I've been using below link to create multiple owa & ecp virtual directories on exchange 2010, but I have similar error -500 internal server error
    during auth.owa from my 2nd owa url login.
    exactly steps follow as below:-
    http://johnyassa.wordpress.com/2012/06/07/publish-multiple-owa-ecp-virtual-directories-on-one-exchange-2010-cas-server/
    did anyone has come across on this issue and do mind share to me?
    thanks
    regards
    Jimmy

    hi Ed Crowley,
    thanks for responding to me...
    yes, I'm exactly follow blog below to configure my 2nd OWA URL with form based authentication method. upon login to my 2nd OWA URL, the owa authentication failed with return 500 - internal server error.
    http://johnyassa.wordpress.com/2012/06/07/publish-multiple-owa-ecp-virtual-directories-on-one-exchange-2010-cas-server/

  • Exchange 2010 SP1 and SP2 are no longer supported.

    Exchange 2010 SP3 is the minimal version that should be installed on your Exchange Servers and just may contain the fixes you need to solve your issue.
    Support for 2010 SP1 and SP2 has ended.
    Before posting a question, please ensure you are running at least 2010 SP3.
    For more details:
    http://blogs.technet.com/b/rmilne/archive/2014/04/09/end-of-exchange-2010-sp2-support.aspx
    Twitter!:
    Please Note: My Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

    Exchange 2010 SP3 is the minimal version that should be installed on your Exchange Servers and just may contain the fixes you need to solve your issue.
    Support for 2010 SP1 and SP2 has ended.
    Before posting a question, please ensure you are running at least 2010 SP3.
    For more details:
    http://blogs.technet.com/b/rmilne/archive/2014/04/09/end-of-exchange-2010-sp2-support.aspx
    Twitter!:
    Please Note: My Posts are provided “AS IS” without warranty of any kind, either expressed or implied.

  • After Exchange 2010 SP3 and rollup 4 update conditional formatting causes messages not to appear in Outlook 2010

    Hi,
    after updating to exchange 2010 sp 3 from sp 2 and also updating to rollup 4, users who use conditional formatting cannot see new message unless they close and reopen Outlook.
    If you decide to change the font colour for unread messages, the messages do not appear in Outlook but a pop up indicates that a new message has arrived.
    If you reopen Outlook, the unread messasge appears.
    remove the conditional formatting and no issue with viewing unread messages as they arrive.
    running Outook version 14.0.7106.5003
    is this a known issue?  a user who never used conditional formatting will experience this right away.
    Thanks,
    rudif

    Hi rudif,
    If the issue only happens to users who use conditional formatting and OWA can work well for all mailbox, I think the issue should be in client side.
    Please try to reset View then set the conditional formatting back to have a try. If the issue continues, please try to recreate the Outlook profile to check whether the issue persists. Also try restarting Outlook in Safe mode by running
    Outlook /safe switch.
    Thanks,
    Winnie Liang
    TechNet Community Support

Maybe you are looking for