I have an Exchange 2003 Server in an Active/Passive cluster. I have been able to move mailboxes around without any issue but lately I have been getting an error when trying to perform any moves. I get this error: <progress code="0" milliseconds="121062">Connecting to source server.</progress> <summary isWarning="false" errorCode="0x8000ffff"> An unexpected error occurred. I also get and event ID 9166 'Failed to log onto the MAPI session on server Exchange. An unexpected error occurred'. And event ID 1088 'Unable to move mailbox "username". Error: An unexpected error occurred'. I have looked the errors up online and the only resolution I can find is to fail the server over to the passive node. The mailbox move process works for a while but then I am back to the same issue. Any ideas on how to resolve this will be greatly appreciated.

It could be becuase of anti Virus on exchange box, make sure the Anti-Virus Exclusions on the Exchange Server or try disable it and move mailbox. http://support.microsoft.com/kb/823166 Best Rgds, Ashish | Unified Comunication | MCTS | MCITP | Please remember to select option "Propose As Answer" if solution work for you | My posts hold no assurances, no promises, and they measured no rights.

Are you sure the databases are healthy, i.e. have you run isinteg against the database? See http://support.microsoft.com/kb/301460 and NOTE that when you run this you need to run it multiple times until you get 0 errors repaired.Troy Werelius www.Lucid8.com

Ashish, Thats a good idea. I may try disabling Symantec and see if the mailbox does move.

The databases were created about six months ago. Hopefully they are healthy. In order to check them with Isinteg I would have to dismount the store first correct?

Yes thats correct. I would try disabling AV firstTroy Werelius www.Lucid8.com

Troy, Thanks, I will try it first. Another question for you, how long does isinteg take to check a database? 60GB for instance?

Depends on the database issues, hardware available, disk speed etc but I would schedule several hoursTroy Werelius www.Lucid8.com

How is thing going on? Does the error message persist when trying to move the mailbox after disabling firewall and checking database? If there is any question or update, please feel free to post it here. Regards, NovakPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Update and Resolution: As a trouble shooting step I split the page file between the C: drive and the D: drive of the Exchange server. I now do not have any issues moving mailboxes and I also got some reporting features back that were not working with Symantec for Exchange. Thanks for everyone's help and suggestions.