You may see an Outlook error “The name of the security certificate is invalid or does not match the name of the site.” if you order a UCC cert. This is because you cannot add your internal server names to the certificate. Therefore, it is necessary to change where Outlook clients connect.
Set-ClientAccessServer –Identity cas –AutodiscoverServiceInternalUri https://mail.myCAS.com/autodiscover/autodiscover.xml
Set-WebServicesVirtualDirectory –Identity “EWS (Default Web Site)” –InternalUrl https://mail.myCAS.com/ews/exchange.asmx
Set-OABVirtualDirectory –Identity “oab (Default Web Site)” –InternalUrl https://mail.myCAS.com/oab
If you are utilizing the Unified Messaging Service (UMS), you will also need to input the following:
Set-UMVirtualDirectory –Identity “unifiedmessaging (Default Web Site)” –InternalUrl https://mail.myCAS.com/unifiedmessaging/service.asmx