Here’s a quick summary of fixed and known issues.

Last updated 8/14/2014

Exchange 2010 SP3 UR6 – Download | KB2936871 Info
Exchange 2013 CU5 – EHLO Blog Post | Download | KB2936880 (CU5 includes SP1 updates)

Blog post about 2013 CU5 I recommend reading:

• Exchange Team – EHLO Blog Post
• Tony Redmond – Exchange 2013 CU5 – the totally unremarkable update (in a good way)
• Michael Van Horenbeeck – New Hybrid Configuration Wizard features in Exchange 2013 CU5

Exchange 2013 SP1 CU5 Known\Found issues

• 7/30/14: Hybrid Configuration Wizard fails with “Check Tenant Prerequisites Deserialization fails due to one SerializationException”
  • This error occurs due to changes in Office 365 and the HCW will throw this error:
    

    Subtask CheckPrereqs execution failed: Check Tenant Prerequisites Deserialization fails due to one SerializationException: Microsoft.Exchange.Compliance.Serialization.Formatters.BlockedTypeException: The type to be (de)serialized is not allowed: Microsoft.Exchange.Data.Directory.DirectoryBackendType

  • See KB2988229 and http://blogs.technet.com/b/exchange/archive/2014/07/30/important-update-available-for-exchange-server-2013-hybrid-deployments.aspx for more details
  • Workaround: Get Interim Update (IU) for Exchange 2013 SP1 or CU5 by calling PSS. This issue will also be fixed in CU6
• 8/13/14: Update causes Outlook 2013 to fail to open archive mailboxes
  • This is actually an issue with the 8/13/14 Windows Update for Outlook 2013, which breaks access to archived mailboxes.
  • This update KB2881011, which updates Outlook to 15.0.4641.1001, and may also occur in 15.0.4641.1002 prevents access to archived mailbox. After removing this update access will work again.
  • For more details see Tony Redmond’s post here: http://windowsitpro.com/blog/update-causes-outlook-2013-fail-open-archive-mailboxes
  • This issue 1st was posted on the Exchange 2013 Facebook group I manage here: https://www.facebook.com/groups/MSEX2013/permalink/874603922568726/ by Jim Collins.
    • Note: This is NOT a support group, but an information sharing group. 
  • Workaround: Remove KB2881011 or follow the steps here to setup the hybrid config with PowerShell http://www.stevieg.org/2014/07/walkingthruhcw/

• 8/15/14: Possible issue with ECP not working when Exchange is not installed in the default path
  • This is from one of my MVP peers: If you don’t install the updates, like IUs, that come as a .MSP files some files will not be updated correctly. This can lead to issues things like ECP
    • Example: The web.config file used by ECP is not updated correctly.
  • Workaround: Install the updates from a admin command prompt

• 9/2: HIGH: OWA bug doesn’t preserve items under litigation and in-place holds
  • Covered briefly in KB2996477
  • Tony Redmond posted about this issue on 8/28 here: http://windowsitpro.com/blog/owa-bug-compromises-item-preservation-litigation-and-place-holds
  • The issue, where a delegated user can delete items that are under litigation hold, seems to have existed since 2013 RTM and still exist in CU6 and Exchange Online as of 9/2/14.
  • Workarounds:
    1. Remove delegated access to mailbox under litigation hold
    2. Disable OWA access to mailbox under litigation hold
    3. Put all users who have been delegated access on litigation hold also

Exchange 2010 SP3 UR6 fixes (from http://support.microsoft.com/kb/2936871)

• 2960652 Organizer name and meeting status field can be changed by EAS clients in an Exchange Server 2010 environment
• 2957762 “A folder with same name already exists” error when you rename an Outlook folder in an Exchange Server 2010 environment
• 2952799 Event ID 2084 occurs and Exchange server loses connection to the domain controllers in an Exchange Server 2010 environment
• 2934091 Event ID 1000 and 7031 when users cannot connect to mailboxes in an Exchange Server 2010 environment
• 2932402 Cannot move a mailbox after you install Exchange Server 2010 SP3 RU3 (KB2891587)
• 2931842 EWS cannot identify the attachment in an Exchange Server 2010 environment
• 2928703 Retention policy is applied unexpectedly to a folder when Outlook rule moves a copy in Exchange Server 2010
• 2927265 Get-Message cmdlet does not respect the defined write scope in Exchange Server 2010
• 2925273 Folder views are not updated when you arrange by categories in Outlook after you apply Exchange Server 2010 Service Pack 3 Update Rollup 3 or Update Rollup 4
• 2924592 Exchange RPC Client Access service freezes when you open an attached file in Outlook Online mode in Exchange Server 2010
• 2923865 Cannot connect to Exchange Server 2010 when the RPC Client Access service crashes

Exchange 2013 CU5 fixes (from http://support.microsoft.com/kb/2936880)

• 2963590 Message routing latency if IPv6 is enabled in Exchange Server 2013
• 2963566 Outlook Web App accessibility improvement for UI appearance in Exchange Server 2013
• 2962439 You cannot sync contacts or tasks in Microsoft CRM client for Outlook in an Exchange Server 2013 environment
• 2962435 CRM synchronization fails if the time zone name of a meeting is not set in an Exchange Server 2013 environment
• 2962434 Slow performance in Outlook Web App when Lync is integrated with Exchange Server 2013
• 2958430 “Some or all Identity references could not be translated” error when you manage DAG in Exchange Server 2013 SP1 in a disjoint namespace domain
• 2957592 MIME is disabled in Outlook Web App when you press Tab to move the focus in an email message in Exchange Server 2013
• 2942609 Exchange ActiveSync proxy does not work from Exchange Server 2013 to Exchange Server 2007
• 2941221 EWS integration for Lync works incorrectly in an Exchange Server 2013 and 2007 coexistence environment
• 2926742 Plain-text message body is cleared when writing in Outlook Web App by using Internet Explorer 8 in Exchange Server 2013
• 2926308 Sender’s email address is broken after importing a PST file into an Exchange Server 2013 mailbox
• 2925559 Users always get the FBA page when they access OWA or ECP in Exchange Server 2013
• 2924519 “SyncHealth\Hub” folder is created unexpectedly after installing Cumulative Update 2 for Exchange Server 2013
• 2916113 Cannot open .tif files from email messages by using Windows-based applications in an Exchange Server 2013 environment
• 2592398 Email messages in the Sent Items folder have the same PR_INTERNET_MESSAGE_ID property in an Exchange Server 2010 environment