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Can't uninstall Exchange2003 after migrating to Exchange2010. One or more users currently use a mailbox store on this server.

If I try to uninstall Ex2003 via System->Add/Remove Programms->Microsoft Exchange, I get following error message:
"One or more users currently use a mailbox store on this server. These users must be moved to a mailbox store on a different server or e-mail disabled before this server can be uninstalled"
I've already searched for AD users with old exchange attributes, but nothing found.
Could you help me?

Metaltree

Have you tried this? I know I've had to do this twice.

http://support.microsoft.com/kb/924170

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ASKER

yes, I did, but I see all users have the exchange2010 as a exchange home server.

Manpreet SIngh Khatra

Go to ADUC and Custom Search and put this in

(&(objectClass=user)(objectCategory=person)(msExchHomeServerName=/o=EXCHANGEORGNAME/ou=First Administrative Group/cn=Configuration/cn=Servers/cn=SERVERNAME))

If you find any account simply go with Delete Mailbox or Remove Exchange Attributes

http://theether.net/kb/100016

- Rancy

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ASKER

I did, I can't find any user with mailbox from exchange2003, I have already deleted a mail store database from exchange2003 via ExchangeServerManager. and nothing -(

ASKER CERTIFIED SOLUTION

Akhater

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ASKER

thank you very much!!!
with this command I got output.txt with 1 record. it was a user, that hadn't mailbox but had "Exchange Home Server" in his attributes.!

Akhater

my pleasure

Manpreet SIngh Khatra

Restart the server once and uninstall ... if still not remove manually

- Rancy