troubleshooting Question

Exchange migration from 2007 to 2013 different domains used for MX records, would this cause email flow issue

Avatar of Vesadmin
Vesadmin asked on
ExchangeEmail Servers
3 Comments1 Solution91 ViewsLast Modified:
Hi Experts,

I'm hoping someone can help me with the following query.

I have a concern regarding changing the MX records on the external DNS servers to prepare for the exchange 2013 migration in coexistence environment which has exchange 2007 on windows 2003 R2 servers 64 bit.

We currently have exchange 2007 environment which is setup with an external DNS MX record of e.g. and both of which currently point to same external IP address e.g. Both domains are registered to the company I work for. This is how it was setup when I first joined the company.

My concern is, would there be any mail flow issues, if I was to setup exchange in coexistence environment and configure exchange 2013 environment to use and point it to a different external IP address i.e. (using exchange 2013 edge transport server in DMZ to send and receive emails) whilst leaving the exchange 2007 to use pointing to the existing IP (using client access and hub transport roles and not the exchange 2013 edge transport server). Our default SMTP email address is

Both domains and have been setup as accepted domains on exchange 2007.

Join our community to see this answer!
Unlock 1 Answer and 3 Comments.
Start Free Trial
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 3 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