OUTLOOK WEB ACCESS.. ACCESS

Now that I've installed ISA and using it as a WEB PROXY/FIREWALL, I CAN'T
access an Exchange server that I have (in another location) via OUTLOOK WEB
ACCESS... Sometimes I simply get an error SCREEN.. Other times, I get into
the interface, only to have my attempts at READING/REPLYING to mail
stymied....

I'm sure there are ports utilized back and forth that I don't have OPEN...
Please let me know...

Thanks in advance..

Glen Howard II, MCP
Systems Administrator
ghoward@xxxxxxxx 
Barnes & Noble.com
  
"If it ain't broke, BREAK IT.. The only thing that is constant is CHANGE"

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