troubleshooting Question

no mailflow between Exchange 2010 and Exchange 2003 during coexistance.

Avatar of SloanIT
SloanIT asked on
ExchangeEmail ServersEmail Protocols
14 Comments1 Solution1036 ViewsLast Modified:
Hi All,

We have a single Exchange 2003 server up until this weekend.  We'd installed a new Exchange 2010 server with co-existance in mind.  After a successful installation, we're faced with the problem that there is no mailflow from 2010 to 2003.  I've created a user with a 2010 mailbox for this test.  No 2003 users have been migrated to 2010.

1.  Emails from 2010 user is unable to send to external recipient (stuck in queue).
2.  Emails from 2010 user is unable to send to 2003 reicipient (stuck in queue).
3.  Emails from 2003 users to 2010 user successful.
4.  Emails from external sender to 2010 user successful.

I have removed and recreated the Routing Group Connector according to Microsoft and the results are the same.  It's bi-directional for the RGC.

We have a BES and I have checked these instructions and applied them and results are still the same.

http://geekswithblogs.net/cajunmcse/archive/2010/04/05/exchange-2010-exchange-2003-mail-flow-issue.aspx

Can someone shed some light?

Thanks!
Join the community to see this answer!
Join our exclusive community to see this answer & millions of others.
Unlock 1 Answer and 14 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 14 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