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Outlook 0x80004005 and exchange 2010 with exchange 2003

Just added a exchange 2010 server to a windows 2003 environment with exchange 2005. Currently exchange 2005 handles outbound email and we have a pop that handles inbound requests. Exchange 2010 has been added to the environment and we are migrating users. Users migrated to 2010 are getting error 0x80004005 and they cannot respond to outside email. I would appreciate any assistance in solving the problem with outlook 2007.
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nichjeff1

8/22/2022 - Mon
ASKER CERTIFIED SOLUTION
mittermueller

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ASKER
nichjeff1

Is there anything specific I should look for? Currently we have outlook pointing to the 2010 server for internal email and have the outlook pointing to exchange 2005 for outbound email. Is there anything in the exchange 2010 that points outlook to itself for outbound?
ASKER
nichjeff1

Understand that we are only having problems with reply's and forwarding of emails. Thanks Jeff
mittermueller

Confused... I think you are talking about Exchange 2003 and 2010, right?
If your old 2003 server is handling outgoing emails you hava to tell the 2010 server to use this server.

Details at: http://technet.microsoft.com/en-us/library/dd638103.aspx
Experts Exchange is like having an extremely knowledgeable team sitting and waiting for your call. Couldn't do my job half as well as I do without it!
James Murphy
ASKER
nichjeff1

Okay, so under HUB Transport we changed the default use all IPV4 for DNS to static DNS of our servers and replies\ forwards started working so I have to say that Mr. mueller solved the problem. Thanks.
ASKER
nichjeff1

Expert pointed us in the right direction