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OWA HTTP Error 502

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sevi

IS-IT--Management
Joined
Jan 29, 2002
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64
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GB
I’ve set-up OWA 5.5 on an IIS Server and seem to have everything working ok internally. However, when I try to access it from the outside across the internet I get the following message :

HTTP error 502
502 Proxy received invalid response
The connection could not be authenticated with the upstream proxy server.

I don’t know where to go from here. Could it be that I haven’t set up my NAT correctly on my firewall?
 
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