So I was working on decomissioning a horribly broken and misconfigured SBS 2011 server today. Part of this was to export all of the mailboxes to PST and import on the new server (don't ask why but the customer had two SBS 2011 servers). When attempting to export a mailbox, i ran into this error:
Couldn't connect to the source mailbox.
+ CategoryInfo : NotSpecified: (0:Int32) [New-MailboxExportRequest], RemotePermanentException
+ FullyQualifiedErrorId : CA71126,Microsoft.Exchange.Management.RecipientTasks.NewMailboxExportRequest
Well that's fun, so i re-ran the export command with
-Verbose and ended up with:
New-MailboxExportRequest : Couldn't connect to the source mailbox. -->
MapiExceptionCallFailed: Unable to make connection to the server. (hr=0x80004005, ec=1249)
Diagnostic context:
Lid: 59431 EMSMDB.EcDoConnectEx called [length=154]
Lid: 34855 EMSMDB.EcDoConnectEx returned [ec=0x4E1][length=56][latency=0]
Lid: 59505 StoreEc: 0x4E1
Lid: 52465 StoreEc: 0x4E1
Lid: 60065
Lid: 33777 StoreEc: 0x4E1
Lid: 59805
Lid: 52209 StoreEc: 0x4E1
Lid: 56583
Lid: 52487 StoreEc: 0x4E1
Lid: 19778
Lid: 27970 StoreEc: 0x4E1
Lid: 17730
Lid: 25922 StoreEc: 0x4E1
After a bit of googling i did find someone else with a similar error, but their solution actually worked oppositely for me, so here is what i did to resolve:
Set-CASMailbox jsmith -MAPIBlockOutlookNonCachedMode:$false
After that, the mailbox exported correctly. I can't say for sure why this was blocked in the first place, but this did resolve it.