Old domain forward to new domain

[digitaldomain12]

We have an old domain xyz.org (old non-exchange mail server) that users no longer use and we're using forwarding to xyz.com from this old mail server.

 

Is there a way for exchange (xyz.com) to take over xyz.org so all mail coming to .org will get forwarded to the .com? Allowing the old mail server to be retired?

[ChrisH]

Give them all a .org alias and update MX records ?

[sukh]

1. Not sure what forwarding you're using or Exch version?

2. Create EMail address policy for all users so that they have both the .org and .com email address.

3. Point the MX records for .org to the new Exchange server and configure Exchange to be authorative for that domain/accepted domain.