Θα πρέπει να είναι ανοιχτή η 443 (SSL) στο δίκτυό σου και να κάνει forward στον Exchange για να καταφέρει το Outlook να συνδεθεί.. Αν τα προηγούμενα τα έκανες σωστά τότε δοκίμασε με τον παρακάτω τρόπο για να δεις αν συνδέεται.
Testing RCP over HTTPS
There are two ways to test whether or not RCP over HTTPS is working.
The first is to try connecting from outside of your internal network.
The second is to filter all ports but 443 while on the internal network
to make sure that Outlook can’t connect via the standard TCP/IP
protocols. To apply such a filter, go to the advanced TCP/IP properties
of your network connection, select filtering, and deny all but port 443.
One important thing to note is that if you’re connecting Outlook to
the Exchange server for the first time, then you must be on the
internal network using TCP/IP. I’m not sure why this is but found out
using trial and error.
To check whether Outlook has connected via HTTPS you must hold down
[Ctrl] and click on Outlook’s taskbar icon. Select ‘Connection status’
and you will see a list of all connections between Outlook and the
Exchange server. These should all be of the type HTTPS.