In transition mode from 2003 - 2010 Exchange Server.
When 2010 mailbox users use mail.domain.com in their Outlook settings for rpc\http the error message is returned ""The certificate common name webmail.domain.com doesn't validate against the mutual authentication string that was provided: msstd:mail.domain.com"
It works fine for 2003 users though, why? How did webmail url become involved?
2. On the 2003 Exchange Server I'm assuming the common name is webmail.domain.com (not sure how to verify) and I know for sure the SANs for this cert has mail.domain.com listed as well. On the 2010 Exchange Server the common name is mail.domain.com (I assume) and for sure has SAN as webmail.domain.com.
Outlook anywhere tab in 2010 is mail.domain.com, Get-OutlookProvider shows nothing for the CertPrincipalName for EXCH, EXPR and WEB, and the firewall is pointing the IP for mail.domain.com to the Exchange 2010 server.
All users need to use mail.domain.com for rpc\http.
So it should work. What do I specifically have to do to get it to work?