Exchange 2016 – POP3 clients not connecting Exchange 2016 Exchange Management Shell Helewix.com How To HendrikWiese Microsoft by HendrikWiese - March 23, 2017March 23, 20170 Exchange 2016 POP3 clients not connecting. Here is my solution and I hope it helps resolve your problem with Exchange 2016 POP3 clients not connecting So I ran into the following when trying to connect Exchange 2016 POP3 accounts. Does not matter what I did I kept running into the same