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OWA HTTP requests exceeded

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OWA HTTP requests exceeded - 11.Jan.2007 11:45:49 AM   


Posts: 2
Joined: 11.Jan.2007
Status: offline
Hi, I have a problem with publishing owa and i have been scratching my head for a couple of days now and its getting to the point where i must get it fixed or call Microsoft.
I had this all working a few weeks back under a different external IP address published through ISA but now its not working. I have this problem in 2 offices who both had their External addresses changed.
Nothing else was changed at either site but it doesn't work.
I have the site published following the guide on here: http://www.isaserver.org/tutorials/ISA-Firewall-Publishing-OWA-RPC-HTTP-Single-IP-Address-Part1.html
When trying to access OWA i get the prompt for a certificate, then i get the ISA OWA form, if i enter in the name incorrectly it takes me back to the form again.
If i enter in the correct details it gives me a message
If i have logging turned on ISA i see loads of requests to port 443 on the exchange server, none of them say denied, but there are so many of them.
I have re-set up the rules and the listener for OWA. I have not created a certificate.
OWA works if i ignore the ISA box and access it from my PC.
I have no idea what the problem is here, any help would be appreciated.
Post #: 1
RE: OWA HTTP requests exceeded - 18.Jan.2007 10:35:43 AM   


Posts: 50013
Joined: 10.Jan.2001
From: Texas
Status: offline
Hi Lee,

Why are you getting prompted for a certificate? Are you requiring User Certificate authentication?



Thomas W Shinder, M.D.

(in reply to lee.don@pertrac.com)
Post #: 2
RE: OWA HTTP requests exceeded - 18.Jan.2007 10:42:24 AM   


Posts: 2
Joined: 11.Jan.2007
Status: offline
Thanks for replying.

I have found the rough area where the problem lies, although i can't be certain.
It looks like someone had turned on forms based authentication on the exchange server, and forms based authentication was turned on ISA.
This was causing it to get stuck in a loop, and generated a lot of http requests before it eventually timed out.

I have got this working in both offices now, similar problems but not the same.
On the other ISA server upgrading from 2004 and rebuilding the isa box fixed it.

(in reply to tshinder)
Post #: 3

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