currently I`m using eM Client to “debug” / “test” a new Exchange 2016-Server from work and its configuration.
At the moment it seems that the Exchange-Server is not offering all possible settings it could offer.For example EWS (= standard way of eM Client to communicate with an Exchange-Server) is not reachable from the outside world at the moment.
I continued to test the server for IMAP(S) and SMTP(S) setup.
Ports with implicit TLS are standardised as:
In the account settings there is a dropdown filed named “Sicherheitsrichtlinie” (= sorry using german GUI-language) which offers different options to choose from.
Maybe eM client Support could shed light on what each option does exactly (lets stick on IMAP(S)-Protocol for this clarification question):
“Keine sichereVerbindung verwenden” (= Do not use a secure connection) > This one is clear (and of course should not be used nowadays).
"SSL/TLS verwenden, wenn verfügbar (= Use SSL/TLS if available) > Text is also clear; what port will this option use if nothing or the wrong port is set (or will it decide whether to use SSL/TLS based on the given Port; e.g. if Port set to 993 TLS will be used, if Port set to 143 no encryption will be used)?
“SSL/TLS erzwingen” (= force SSL/TLS) > Text is also clear; what will happen here if no or wrong Port is set?
“SSL/TLS auf bestimmten Port verwenden (Legacy)” (= Use SSL/TLS with a specific port (Legacy)) >This one is to most difficult to understand form my point of view;but its the one I use at the moment and set to 993 for IMAP(S) to be used >> Also this setting works for the server I`m dealing with
For SMTP(S) I have had no success in establishing a connection > I assume that our new Exchange 2016 will only accept the SMTP-Auth-Mechanism of NTLM at the moment.
Ho do I activate NTLM for an account?