I'm trying to migrate Exchange mailboxes from an Exchange 2003 server to an Exchange 2007 server that is in a separate Forest. I found this article http://blogs.technet.com/b/exchange/archive/2006/11/02/3396084.aspx that explains it pretty well. However when I run the following. get-mailbox -domaincontroller 'msepow01dc01.olddomain.local' -credential $sourcecredential -database 'msepow01ex02.olddomain.local\MES Store 1' | move-mailbox -targetdatabase 'PSOLUS210.newdomain.com\Mailbox Database' -identity 'user1' -sourceforestglobalcatalog 'msepow01dc01.olddomain.local' -globalcatalog 'psolus200.newdomain.com' -domaincontroller 'psolus200.newdomain.com' -ntaccountou 'OU=PSOLUS,DC=newdomain,DC=com' -sourceforestcredential $sourcecredential -targetforestcredential $targetcredential I get the following error: "Failed to reconnect to Active Directory server psolus200.newdomain.com. Ensure the server is available and that you are using valid credentials. I'm using valid credentials so I'm not sure why I'm getting this error. Any suggestions would be greatly appreciated. Vincent Sprague

I realized that when I was entering credentials I was doing just the username instead of domain\username. After I switched it started working properly.Vincent Sprague

Thanks for your update and sharing. Have a nice day:)Fiona Liao TechNet Community Support