If it's any help, we'v had this problem with a number of ISPs. It looks like some run 
caches that only accept a limited set of HTTP verbs, and throw away any request that 
uses others. This nobbles OWA. We found the answer was to put a certificate on the 
server and get people to access it via https:. Web proxies/caches have to tunnel SSL 
traffic, and we've had no further problems.

> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]]On Behalf Of 
> Andrea Coppini
> Sent: Wednesday, October 02, 2002 3:14 AM
> To: Exchange Discussions
> Subject: RE: OWA from a client behind FW
> 
> 
> Thanks for the Q, but these servers (or the clients) are not behind a
> proxy.
> 
> Apparently it's an ISP issue.  A colleague of mine tried it from his
> home Cable connection (which is on the same ISP as the office) and he
> had the same problems.  I tried it using my home ADSL connection
> (different ISP) and it was fine.
> 
> Spooky...
> 

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