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Exchange Outlook Web Access

Posted on 2007-04-11
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Last Modified: 2010-04-20
What port has to be forwarded on the router to allow Outlook Web Access?
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Question by:tstech248
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Expert Comment

by:LauraEHunterMVP
ID: 18891898
Do you mean solely for allowing incoming clients to connect to OWA from the outside world?  Assuming you have enabled SSL for your OWA servers (and please tell me you've done this), TCP 443.

If you are trying to configure communications between FE servers and your DCs/GCs, follow the recommendations in this article: http://www.msexchange.org/tutorials/OWA_Exchange_Server_2003.html
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by:tstech248
ID: 18894192
I cannot open 443 up on the router at this point. is it mandatory to open this to get OWA to work at any level?
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by:tstech248
ID: 18894456
anyone this seems like it could be a simple question!
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LauraEHunterMVP earned 500 total points
ID: 18894799
If you were to open up a different port for incoming SSL traffic, you would need to instruct your clients to change the URL that they use to access OWA.  So instead of https://www.company.com/mail, they would need to enter https://www.company.com:444/mail, as an example - I don't have to tell you the kinds of help desk calls this would generate in an organization of even the smallest size.  You would also need to re-configure the OWA servers to accept incoming SSL traffic on the alternate port.

The choice to use non-standard ports for a web application is...sub-optimal, to say the least. (Read: "I wouldn't do it if you paid me.") My best advice would be to open 443 for incoming SSL and be done with it.
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