If you change the MAPI virtual directory URLs by using the Exchange Admin Center (EAC), all forms of authentication are removed from the MAPI virtual directory.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
ID članka: 3212580 - posljednja izmjena: 13. pro 2016. - verzija: 1
Exchange Server 2016 Enterprise Edition, Exchange Server 2016 Standard Edition