its easy enough - are u running ISA?
a quick copy paste job (far easier than me telling you how)
The following needs to be done in order to make OWA available on the
Internet.
1. Make sure that the OWA authentications settings on all front-end and
back-end(mailbox) servers is set as follows:
Note: This assumes OWA 2000 and/or OWA 2003
Legend:
ESM = Set through Exchange System Manager
IIS = Set through the IIS console
Exchange & Public(ESM): Basic(w/ Default Domain = <internal netbios name of
domain>)
Exchweb & all subdirectories(IIS): Anonymous
Note: All check boxes, except those listed above, should be unchecked.
Note: After selecting the above settings, restart the Default Web Site(DWS).
2. Publish the following directories through the firewall.
Note: If using one or more front-end servers, only publish the directories
on the front-end servers.
--Exchange
--Public
--Exchweb
Note: We recommend that SSL be used from the client to at least firewall,
and that all front-end and back-end servers be put on the LAN. We do not
recommend that front-end servers be placed in a DMZ.
Note: Host to publish OWA behind ISA 2000
Q290113(How to publish Outlook Web Access behind ISA and)
http://support.microsoft.com/default...b;en-us;290113
http://www.smallbizserver.net/Deskto....aspx?tabid=83