Can't connect to Exchange Server 2016 by using Chrome or Firefox


Symptoms


When you try to connect to a Microsoft Exchange Server 2016 server installed on a Windows Server 2016 computer by using Mozilla Firefox or Google Chrome, you receive an error message. The error messages are as follows.

Chrome: ERR_SPDY_INADEQUATE_TRANSPORT_SECURITY
Firefox: NS_ERROR_NET_INADEQUATE_SECURITY

Resolution


Microsoft acknowledges this is an issue with Exchange 2016. It will be addressed in Cumulative Update 6 for Exchange Server 2016.