Very few organizations install Exchange updates the moment they are released. Most wait a few weeks to a month. Some wait much longer, and, with Microsoft’s recent track record with Exchange updates, who can blame them?
So far, Exchange 2010 SP2 Rollup Update 6 looks pretty safe, but it’s only been out for a week. Let’s see how things develop. Here are the problems I’ve seen reported so far.
Exchange 2010 SP2 RU6 Readiness: It depends… See my verdict here.
|(Common) Installation fails. Event ID 1603.||
|(Common) Error: “Failed to clean up the source mailbox…” after moving mailboxes between databases||This problem actually started with SP2 RU3, but it continues in RU6. The workaround is to manually clean up the old mailbox using the Remove-StoreMailbox cmdlet.|
|(Common) Cannot delete emails in OWA or Outlook 2007 (probably other clients as well)||Problem reported on booking requests, message recall notices, and messages with From fields that use extended character sets.|
|(Common) “From” fields are blank in some emails||Problem appears to be related to extended character sets for some languages. I haven’t seen a solution to this yet.|
|(Uncommon) Installation hangs on removing Exchange files||Uninstall the last installed RU and try again. Or uninstall all previous RUs.|
|(Uncommon) Installation fails: “Control cannot leave a final block” or “Ended prematurely”||No further information|
|(Uncommon) WMI Performance Adapter service terminated…||The solution sounds dubious to me: Reboot server until the events no longer appear in the logs.|
|(Uncommon) “The setting MaxNoOfItemsMove in the Web.Config file was not valid. The previous value was null and has been changed to 1000.”||Problem resolved itself by the value change. Unclear whether the value had to be manually added to the Web.Config file or if the installation made the change automatically.|
|(Uncommon) Outlook 2002/Outlook XP clients break. Outbox inaccessible.||Upgrade clients. Exchange 2010 doesn’t support Outlook 2002/XP.|
|(Uncommon) Installation fails: “An error occurred while writing installation information to the disk. Check to make sure enough disk space is available…”||Uninstall KB2506143 and KB2506146|
|(Uncommon) Room delegates are unable to approve meeting requests. Error message: “Cannot move the items. Some items cannot be moved. They were either already moved or deleted, or access was denied.”||No known solution at this time.|
I’ll add to the table as I learn more. If you see any other problems and/or solutions related to the installation of Exchange 2010 SP2 RU6/UR6, let us know in the comments section.
Update 2013-02-27: Uh oh! It looks like there might be an RU6 v2 in the works. Who would have guessed that would happen?
Update 2013-03-11: Maybe I spoke too soon. There should be an RU6 v2 in the works, but I haven’t seen any public acknowledgements from Microsoft about the problem everyone seems to be having with deleting certain emails. Until they fix that, I can’t recommend installing RU6. I guarantee that my users would complain about it almost immediately, and if Exchange looks sloppy and unprofessional, then I look sloppy and unprofessional.
Update 2013-06-03: According to Andy at the Exchange Team Blog, there is an Interim Update to fix the soft delete issue. And, according to Paul, MS will not be publishing any more updates for Exchange 2010 SP2.
If you want me to email you an update when it looks like RU6 is more-or-less safe to install, just leave your email address here: