Hi, on weekend I have move some of the user to new domain but some of the are getting emails from outside but when they get email from within company it bounce back saying this user does not existed. e.g domain is main domain and domain 2 is our other partners, we are moving users from domain 2 to our domain so i have linked domain and domain 2 for each. When user send email to domain 2 it checks for user if it can't find then it pass onto domain to ask is this user on your exchange. I checked the exchange server to see if the message was sent where i can see it has been send but it was saying user not found. its giving me ou address which i can't seem to find anywhere on domain 2. anyone know why this would be happening.

Internally Exchange doesn't use the SMTP address. It uses an X.400 address. If the users are replying to old email then the email is going to fail. Do the old user accounts still exist? If so then a contact to forward to the new accounts will work. Simon. Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.

We deleted the old account. Its working now it was the global address book which had still email accounts

We deleted the old account. Its working now it was the global address book which had still email accounts

We deleted the old account. Its working now it was the global address book which had still email accounts You will still have problems with people replying to old email though. This article from the SBS team explains the issue. http://blogs.technet.com/b/sbs/archive/2009/05/21/cannot-reply-to-old-emails-or-modify-old-calendar-items-after-pst-mail-migration.aspx Simon.Simon Butler, Exchange MVP Blog | Exchange Resources | In the UK? Hire Me.

Its working fine send and receiving emails. thank you for your reply.

hi, Very glad to hear that. Please remember to mark as answer. thanks,CastinLu TechNet Community Support