I have gone through a HORRENDOUS Exchange 2003 to Exchange 2010 conversion. My current issue is that the Default EAP policy assigned all my users an email address of domain.local. So all mail is now being rejected. I tried to modify the Default EAP using EMC and EMCShell to no avail.
Here is the error I get when trying it by EMC: you can't specify the recipient container because legacy servers are detected
Someone please help lol.. cause this upgrade has been a disaster. THere is a legacy Exchange 2003 server here.