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.
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: