I have a customer with a SBS2008 domain and a Zyxel Zywall USG100 router.
I had to set this router back to factory default.
I thought everything was ok until I was aware, that it is no longer possible to access Outlook Web Access (OWA) through the normal address HTTPS://REMOTE.DOMAIN.COM/OWA.
If you do this, you just get the login page of the Zyxel firewall.
This could be internal DNS but I have only been tampering with the router???
Somebody please give me a hint! :-)
....and have a nice weekend