I have 02 domains (atco and inpro) in a forest. Users from both domains connect to exchange 2010 in atco domain. They also use atco domain email addresses. While I was able to move all mailboxes of atco domain from Exchange 2003 to Exchange 2010, I am unable to move user mailbox for inpro domain users to the new Exchange 2010. Error: Active Directory operation failed on Michael-frank.inpro.com.
On System Settings tab on Exchange 2010 only domain controllers/GCs of atco domain are shown. Exchange is probably not able to communicate with domain controller on inpro domain.
In the Event Log Event ID 2080 the in-site domain controllers are:
Please find a solution to this problem. Thanks.