Outlook connection protocol, auth, encryption & status

A quick way to check or beginn to troubleshoot the used protocol, authentication, encryption and connection status of Microsofts Outlook client as well as to find out which version is running on your Microsoft Exchange server or Microsoft Office 365 server is to use:

1. CTRL + right-click on the outlook icon:
    
2. Select "connection status":
   
3. The following window will appear:
   
   There the server, the proxy-server, the used protocol, the authentication method, the encryption, the status and the exchange-server version can be quickly checked.

More in the Microsoft support article.