I followed the instructions in the attached link: http://www.experts-exchange.com/OS/Microsoft_Operating_Systems/Server/SBS_Small_Business_Server/Q_25005312.html
to migrate Exchange 2007 running on Windows SBS 2008 to Exchange 2010 running on Windows Server 2008 R2 on a completely separate server.
Nearly everything is working correctly except for Activesync. When trying to connect a device via Activesync, the automatic configuration option fails. According to the log on the device, there appears to be an issue with the certificate:
"checking certificate...checking to see if server is self-signed:
https://remote.mydomain.com Server cert not trusted, setting accept all certs
Checking Activesync with SSL...
ActiveSync location returned HTTP code 404: Not Found
ActiveSync version check returned negative, but still trying for 12.1"
Also, each time a user opens Outlook, they are prompted with a security alert. The security alert indicates that the name on security certificate is invalid or does not match the name of the site.
As info, the certificate we are using is NOT a self-signed certificate. We were using a go-Daddy certificate on the SBS server. The external web address of the old SBS exchange server, remote.mydomain.com, was simply re-assigned to the new exchange server. As such, I rekeyed the certificate last night. I generated a request from the Exchange 2010 server and used that request to rekey the certificate. After installing the certificate, I configured the IIS service to use this newly rekeyed certificate.
I'm sure I've missed something but I'm at a loss at this point. Certificates are not my expertise!