I just migrated from ex 2007 to ex 2013. I got most of the bugs fixed, but just discovered another problem yesterday.
Externally, when people try to access mail.domain.com, it serves the following error:
403 - Forbidden: Access is denied.
You do not have permission to view this directory or page using the credentials that you supplied.
When going to https://mail.domain.com, that works fine, it redirects to my OWA.
Any idea's how to fix this, how to get the mail.domain.com to also redirect to my owa?