I am at my wits end with a certificate issue on a new Exchange 2013 installation. I installed a certificate from godaddy.com that works fine for Exchange ActiveSync and allows Outlook Anywhere access. The internal domain is domain.local and the certificate is setup for mail.domain.com. I created dns entries for mail.domain.com on the dns server and they resolve to the local email server. All internal and external addresses are set using https://mail.domain.com/.... within the Exchange Admin Center.
All users are receiving the following error when they open Outlook.
"There is a problem with the proxy server's security certificate. The name on the security certificate is invalid or does not match the name of the target site exchange-cal.domain.local. Outlook is unable to connect to the proxy server. (Error Code 10)"
They also receive a security alert stating the name on the security certificate is invalid or does not match the name of the site,
Outlook works fine, but users are complaining about the pop ups.
Is there a way to resolve the pop ups other than purchasing a san certificate? I understand that many certificate authorities will not issue certificates with domain.local internal domain names.
Thanks so much,