DeskPro’s probably the best ticketing system out there for the money by far for many reasons – and we audit a lot of them - believe me.
If you’re looking for full AD integration in a forum then Jitbit (
http://www.jitbit.com/asp-net-forum/) seems to be the best solution at the moment. Delving deeper in in to phbpbb’s ldap implementation has revealed a comedic lack of ability and some very worrying levels of security too.
Assuming you have some Windows servers around if you’re using AD, Jitbit is an asp.net forum that offers support for MySQL. Would prefer to use Xenforo as it’s much prettier, but Jitbit seems pretty much it for full on hassle free AD integration at the mo.