1. Type cmd on the Start menu to open a Command Prompt.
ping mail.yourservername.com to find your IP address and the hosts server name.
3. If the server name in the ping results matches the name on the certificate, use it as the mail server name in Outlook.
4. If the name is different, ping the server name used in the certificate. If the IP address matches your mail server's IP address use it as the mail server name in Outlook.