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Exchange 2010 mail routing to 2007 server

Posted on 2014-01-16
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Good Morning experts,

We are currently in a co-existence phase that I would like to wrap up and have gone from Exchange 2007 to 2010.  

Almost all mailboxes have been successfully moved.
Certs are installed and working properly
Our firewall and spam filter rules have been changed and are all pointing to the new exchange server.
The mx record is still currently pointing to the old exchange server.

I have the checklist from Microsoft for the remaining tasks.

Here is my question.

I have the hub Transport role and smtp recievers created on the new server but mail is still routing to and from the old exchange server?

Is the mx record the reason this is still happening, or does this not route though the new one until I fully decommission the old one?

Any assistance is appreciated.

Thank you,

Karen
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Question by:klsphotos
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Simon Butler (Sembee) earned 500 total points
ID: 39785850
Inbound email will go wherever you have the MX records pointing. Therefore you either need to change the DNS to point to the new servers, or change the forward on the firewall to send the SMTP traffic there.

Outbound email will use all of the Send Connectors. Send Connectors are an org setting, not a server setting, so if you have created new Send Connectors in Exchange 2010 then those will be used along side those on Exchange 2007. You need to delete the connectors and/or remove the Exchange 2007 servers from the list of source servers.

Simon.
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by:klsphotos
ID: 39786277
Thank you.  After I typed this I found the check box that is checked that is telling Exchange to handle the routing by MX record.  I have not done the other steps you mention.

Thank you very much!
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