Our exchange server has two IP addresses.
One for lan, the other for WAN/PPP Interface.
When pinging the server name the WAN/PPP ip is returned, and thus the server is unaccessible.
If I flush the DNS and re-register it on the client experiencing this it will revert back to the LAN address..
But after a while it goes back to the WAN/PPP interface again.
How can I resolve this? What is the best solution, and why is this happening?