[b]OWA not authenticating externally[/b]

[frankygee]

I have an SBS 2003 server moved to new hardware.
The transfer went ok but I have no OWA or RWW functionality from outside the network.
If I login from the LAN

https://servername/exchange

or remote all works fine.
From outside the LAN I get a username or password incorrect message for OWA and RWW on all user accounts including admin

Have been trying to figure this one out for the last 2 days.
Any help would be greatly appriciated.

Thanks.
Frank