just Let you know what I have done to setup client computer at Pumptek Bangkok office.
Please see attached for Pumptek user who has joined computer to domain already. (pumptek_username .pdf)
For user not available to join to domain they need to use OWA for access their email or they can setup outlook application for connect to exchange server by the way for how to setup please find attached (Set up outlook client connect to exchange server.pdf)