Since upgrading to Exchange/Outlook 2010, we needed to purchase an SSL cert; which we did from Digicert. Everything checked out fine on the cert. However, since configuring with Exchange 2010, our users are getting the Security Alert for mail.my-internal-domain.com. The cert was configured for mail.my-external-domain.com. I do have a green check mark indicating "the security certificate is from a trusted certifying authority" and for "the security certificate date is valid" However, i have a red x for "the name on the security certificate is invalid or does not match the name of the site."
All mail is flowing as expected.