When trying to open a user's mailbox, I get this message: This mailbox can't be opened. For more information, contact your helpdesk. Looking at the error logs in Exchange I see this: User (USERNAME) (/o=Company /ou=Exchange Administrative Group (FYDIBOHF23SPDLT)/cn=Recipients/cn=name,user) failed to log on because their mailbox is in the process of being moved. I don’t see her listed in the move requests section though, no one is listed there. Any ideas?

How about with Get-MoveRequest ? Any other errors? Check the CAS, any Mailbox Repl Service errors? Is that service started? Can you restart it?

Hi Andy, Thanks for the reply. Get-MoveRequest did not return anything, nor did get-moverequest -movestatus inprogress. The Mailbox Replication Service was started. We went ahead and restarted that and the System Attendant. There are some errors relating to Mailbox Replication Service, but they are stemming from an old database store that we are no longer using, so I'm not sure if this is related. I believe this data store was corrupt so our main Exchange admin created new data stores and moved everyone out. The Microsoft Exchange Mailbox Replication service was unable to process jobs in a mailbox database. Database: MailStore2010 A-H Error: MapiExceptionLogonFailed: Unable to open message store. (hr=0x80040111, ec=-2147221231) Diagnostic context: Lid: 55847 EMSMDBPOOL.EcPoolSessionDoRpc called [length=233] Lid: 43559 EMSMDBPOOL.EcPoolSessionDoRpc returned [ec=0x0][length=272][latency=0] Lid: 23226 --- ROP Parse Start --- Lid: 27962 ROP: ropLogon [254] Lid: 17082 ROP Error: 0x80040111 Lid: 26937 Lid: 21921 StoreEc: 0x80040111 Lid: 27962 ROP: ropExtendedError [250] Lid: 1494 ---- Remote Context Beg ---- Lid: 26426 ROP: ropLogon [254] Lid: 44215 Lid: 60049 StoreEc: 0x8004010F Lid: 49469 Lid: 65341 StoreEc: 0x8004010F Lid: 56125 Lid: 47933 StoreEc: 0x8004010F Lid: 32829 Lid: 49213 StoreEc: 0x8004010F Lid: 48573 Lid: 64957 StoreEc: 0x8004010F Lid: 59409 Lid: 45073 Lid: 11173 StoreEc: 0x80040111 Lid: 22970 Lid: 8620 StoreEc: 0x80040111 Lid: 1750 ---- Remote Context End ---- Lid: 26849 Lid: 21817 ROP Failure: 0x80040111 Lid: 26297 Lid: 16585 StoreEc: 0x80040111 Lid: 32441 Lid: 1706 StoreEc: 0x80040111 Lid: 24761 Lid: 20665 StoreEc: 0x80040111 Lid: 25785 Lid: 29881 StoreEc: 0x80040111 I also see this error message: Exchange Search Indexer failed to enable the Mailbox Database MailStore2010 A-H (GUID = d4781923-5c80-4b85-92dd-bdbc22947463) after 1 tries. The last failure was: MapiExceptionMdbOffline: Unable to get CI watermark (hr=0x80004005, ec=1142)

Wow, please disregard. The answer was so obvious. For some reason our domain admin permissions were stripped from this one users mailbox, thus we could not log in. Once we added domain admins back to the Manage Full-Access permission we could get in. Sorry about that, thanks for your time, Andy.