This is using MS Exchange 2003 server in W2K3 AD domain. There are 2 branches, A and B, located in overseas. Both branch A and B connected to HQ, in which Exch 2003, DC located.
For branch A, there is an VPN site-to-site connection. All laptops were setup with Outlook Anywhere without problem. But, in branch B, there wasn't any vpn connection. So, for new laptop, we pass the setup guide to the IT support over there to follow the same instructions. At first, they have to be connected with vpn to the HQ with the laptop, and then setup MS outlook. After the setup, Outlook anywhere seems working fine. But, once this laptop is not connected with vpn, the outlook anywhere doesn't work, with error message - can't resolve exchange server...
What's went wrong? What is the requirements for outlook anywhere?
Thanks in advance.