Connection Test
If the connection cannot be created successfully, first check the following points:
Administrator account:
Gateway not installed
Gateway service has not been started
Incorrect host and/or IP address
Password incorrect (after installation, "1234")
Firewall settings (port 8087 blocked)
Connection to Exchange account / additional users:
Mailbox does not exist
Invalid login information
Mailbox has not yet been initialized on the Exchange server (after creating a mailbox, one must log in at least once with Outlook)
Outlook Web Access is not reachable (check with your Exchange administrator)