We recently started using MS Azure, but we run AD locally and replicate to it. We still use the local AD server for osTicket so I dont think that I will be much help, but I can try. Let's start with: Please help us to help you by reading and following the posting guidelines located in this thread: Please read before requesting assistance. The more information you give us the better we will be able to assist you. Thank you.Version of osTicket?Version of Authentication: plugin?Settings being used?HAve you checked your local firewalls?Can your webserver talk to the hosted AD server?