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Installed 2010 Edge Transport and now getting 451 4.4.0 on 2007 Hub Transport

Greetings,

I'm in the middle of an Exchange 2003 / 2007 to 2010 transition.  Mailflow was working between all 3 environments.  I installed an Exchange 2010 Edge Transport server in the DMZ, created a new subscription and applied to internal org via Hub Transport 2010 server.  Test-EdgeSynchronization and Start-Syncrhonization were successful but mail starts queuing up on the Hub transport server with error 451 4.4.0 and 451 5.7.3 Cannot achieve Exchange Server authentication.

Any ideas what may be wrong?
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loudelat
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loudelat
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1 Solution
 
sunnyc7Commented:
Did you open port 50636 from DMZ to Internal network for Edge Sync ?
Check the port requirements here:
http://technet.microsoft.com/en-us/library/cc526574.aspx

I'd restart AD LDS on Edge Server and give it a shot.

There are some guides here:
http://technet.microsoft.com/en-us/library/bb124896(EXCHG.80).aspx

and this kb
http://support.microsoft.com/kb/976108


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loudelatAuthor Commented:
Thanks. Required ports are open. DNS resolution is successful. Restarted services but still not working.
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loudelatAuthor Commented:
Issue resolved. ASA firewall was performing fixup on smtp which was causing mail delivery issues. Disabled fixup and all is well again.
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loudelatAuthor Commented:
Resolved by submitter.
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loudelatAuthor Commented:
Resolved
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sunnyc7Commented:
Thanks for updating the ticket with the solution.
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