What happened to my targetAddress attributes????
Like many things I learn in IT, I learned a new lesson "the hard way". We are migrating from an old forest to a new forest using Quest. The Quest mailbox migration, once it completes the migration of a mailbox, puts on the user's targetAddress attribute the SMTP of the new location. For example, the mailbox's new SMTP address is Luke@newdomain.com, so it puts in the old mailbox's targetAddress attribute SMTP:Luke@newdomain.com.
The Exchange "move mailbox" wizard actually CLEARS this attribute if you move the mailbox from one database to another in the same organization. We needed to shutdown some old mailbox servers, so we ExMerged all of the data out of the mailboxes that had been migrated, then moved the empty mailboxes to a single Exchange server.
Forwarding immediately stopped working. After some frenzied investigation, we found that the targetAddress for the moved mailboxes had been cleared. A call to our Quest consultants confirmed this. So, keep this in mind if you have to move mailboxes that have a targetAddress set on them!!!!