Good Afternoon Everyone,
Here is my situation:
Current Exchange 2007 Environment has 1 CA/HUB server, 3 MB Servers, and 1 legacy 2003 server.
Uninstalled a legacy 2003 server from the environment, and followed all of the steps appropriately. Uninstalled Exchange, then deleted the Administrative Group since it was now empty. Unfortunately, up until that point, the default email address was the x.400 address, which was invalidated when I removed the Legacy Administrative Group. I have since reset the Address Recipient policy, re-applied it, and rebuilt the OAB and forced a download.
My remaining problem is that any time a user replies to an old email, it defaults with the x.400 address and generates an NDR with the following error:
IMCEAEX-_O=<Exchange Org Name>_OU=<Deleted Legacy Admin Group>_CN=<User's AD OU>_CN=<AD OU>_CNemail@example.com
#550 5.1.1 RESOLVER.ADR.ExRecipNotFound; not found ##
What I'm looking for is a way to make the old x.400 addresses valid again. I tried to create a transport rule and strip the 'IMCEAEX' Etc out of the header, and that didn't work. I also tried to create a send connector that was an x.400 pointing to the smtp.domain.com SMTP address, and that didn't work either. I just need to make these old legacy email addresses work.