I am unable to get into the Management Console, but mail is being delivered without a problem. I'm not sure when this problem started but the most recent changes I made to AD are as follows. I added a third 2008 R2 DC, had to extend the schema to do so. After that this DC was moved to a new site and it's IP was changed. After changing the IP I stopped teh Netlogon service, flushed the DNS cache, and ran IPConfig /registerdns and restarted the netlogon service. I also added an additional site and moved the new DC to that site. I renamed the default site to reflect it's location. There are only 2 sites and 3 DC's and one Exchange 2007 server. Due to the timing I'm assuming these changes caused the problem, but not sure where to start. Any help anyone can provide would be greatly appreceated.

Restart the Exchange Services, specifically the System Attendant and Active Directory topology service. That will force Exchange to update the list of domain controllers and where they are. Simon.Simon Butler, Exchange MVP Blog | Exchange Resources

Thanks that did the trick. I was hoping it was something simple.