I cannot get the Exchange sync for Contacts to work. It won't connect to a PublicFolder or a user's email account. I've created the impersonation account and given it the proper permissions. When I add a PF, it accepts the path but nothing happens. Same with the user email. 3CX v15 Pro - Debian is fully updated and funtioning as expected. I have fully patched Exchange 2013 and all PF are accessible through Outlook. Any insight as to what I'm doing wrong?