PIX 520
I have some windows 2000 and winXP clients using the 3.1.1 VPN client. they can always successfully establish a VPN connection but sometimes they get the message "the exchange server is unavailable". when they're connected to an ISDN or DSL line at home they can access our exchange server fine - IMAP connection. when they're in certain hotels they can and others they can not. we have 1 small remote office behind a firewall running DHCP and NAT on the inside and they can't connect to the exchange server there. I'm wondering if NAT is the problem? shouldn't be but I don't get it. any guidance would help, thanks!
vaughn
