The name of the security certificate is invalid or does not match the name of the site
KB ID 0000036 Problem Seen in Outlook when connecting to a mailbox on an Exchange Server, its caused by using a self signed certificate OR a purchased certificate, where the internal and external names are different. The name of the security certificate is invalid or does not match the name of the site. Solution Before proceeding if you have an A or CNAME record in your DNS for autodiscover then DELETE it and setup an SRV record!...