I have OSticket v1.9.0 (d5b9d83) on Ubuntu 14.04 and I'm trying to use the LDAP plugin. When I click on "Save Changes" all I get is a blank page but only if I enter the FQDN for the Default Domain. If I leave that blank then I get the same page back but indicating that I need to enter something for Default Domain. My server is hosted on AWS and my AD server is on our internal network. I've tried to enter just the FQDN without the DNS entry and I get the same as if I enter our internal DNS server. Do I need to create an entry for the FQDN in our external DNS (i.e., Godaddy)?