troubleshooting Question

Microsoft Exchange Migration issue

Avatar of Jeff Romlein
Jeff RomleinFlag for United States of America asked on
ExchangeOutlook
7 Comments1 Solution448 ViewsLast Modified:
We recently completed an exchange Migration/merger. Some users are now getting 550 5.1.1 RESOLVER.ADR.ExRecipNotFound errors. They do not get these when using OWA. We have tried deleting their NK2 files but this did not work. If they get an error for a person, have that person send them an email and then they reply the issue goes away for that email address.

Let me know if you need more information.

Any ideas?

Additional background.

We have 2 AD forests with a 2 way trust.

Forest 1 - Coakley
Forest 2 - Records

The Coakley forest contains users and the old exchange 2003 server

The Records forest contains users and the exchange 2010 server. The records users have been using this server for several months. The Coakley forest users mailboxes have just been migrated.

The Coakley forest users mailboxes are linked mailboxes, the records forest users mailboxes are normal User Mailboxes.
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 1 Answer and 7 Comments.
Join the Community
Learn from the best

Network and collaborate with thousands of CTOs, CISOs, and IT Pros rooting for you and your success.

Andrew Hancock - VMware vExpert
See if this solution works for you by signing up for a 7 day free trial.
Unlock 1 Answer and 7 Comments.
Try for 7 days

”The time we save is the biggest benefit of E-E to our team. What could take multiple guys 2 hours or more each to find is accessed in around 15 minutes on Experts Exchange.

-Mike Kapnisakis, Warner Bros