I have two servers running Exchange 2003 in separate exchange organizations and separate AD forests.
Currently we have Server A forwarding any unresolved mail to Server B. This is working as a "shared namespace" scenario. Mail flow is working.
Our migration plan calls for us moving the Mailbox from Server A to Server B, then deleting the mailbox from Server A. We then planned on creating a contact on Server A for the deleted mailbox.
My question is....I want to migrate users from Server A to Server B. How can I maintain user's distribution group membership so that their new mailbox on Server B receives email when mail is sent to a Server A distribution list?
Example, UserA now exists on Server B as a mailbox enabled user. User A's contact now is a member of a distribution group on Server A named "Office Supplies"
I try to send an email to the distribtuion group on Server A and get the following error:
A configuration error in the e-mail system caused the message to bounce between two servers or to be forwarded between two recipients. Contact your administrator.