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Exchange SBS 2003 to 2010 Migration

Posted on 2013-01-26
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I'm working on migrating a SBS2003 box to Server 2008 R2 and Exchange 2010.

The issue I am having is when I change the firewall to point to the SMTP on the Exchange 2010 box, no users on the Exchange 2003 box are getting email and vice versa.

I thought there was a way to make the two servers talk to each other for incoming SMTP, but it has been a while since I did a migration.

Any ideas?
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Question by:truth_talker
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by:Slav Zabicki
ID: 38823130
did u move mailboxes from 2003 to 2010?
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Slav Zabicki earned 2000 total points
ID: 38823132
by the way read this article: http://www.networkworld.com/community/node/47632

check if you didn't miss any steps
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by:truth_talker
ID: 38823153
I haven't moved all of the mailboxes yet.  I have multiple sites and don't want to move everyone at one time.

Was hoping I could have the email come into one server and send over to the other server if not in the main server receiving on SMTP.
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by:Slav Zabicki
ID: 38823167
hmm
are those mailboxes you moved to 2010 working fine?
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by:truth_talker
ID: 38823176
Think I just figured it out.  Needed to create a Routing Group between the two servers.

Used this link and now mail is flowing out and in through both servers but from the Internet only to one server's SMTP on port 25.

http://social.technet.microsoft.com/Forums/en-US/exchange2010/thread/f379cce6-b440-470e-b262-5a9f0eae53a4
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