troubleshooting Question

RPC over HTTP to SBS 2003 has stopped working

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JonFleming asked on
ExchangeWindows Server 2003SBS
29 Comments1 Solution1491 ViewsLast Modified:
Running SBS 2003 SP2 with almost all users using Outlook 2003 on XP Pro but the experimental client I'm using has Outlook 2007 on Vista Ultimate. We do not have a 3rd-party certificate, ours is self-signed. Outlook RPC over HTTP has been working flawlessly for a year or so. It stopped working. I didn't change anything. Yeah, I know you've heard that one before.

On the server, the Default Web site | RPC | Properties | Directory Security | Authentication and Access control is correct: anonymous access un-checked, basic authentication checked. I've tried it with and without the Default Domain filled in. In Web Service Extensions | RPC Proxy Server Extension | Properties the path to rpcproxy.dll is correct; C:\Windows\system32\rpcproxy\rpcproxy.dll.

On the client, Connect to Microsoft Exchange using HTTP is checked, and in Exchange Proxy Settings the URL is https://{my FQDN}, Connect using SSL Only is checked, Only connect to proxy servers that have this principal name in their certificate is msstd:{my FQDN} (that's worded differently in Outlook 2003), On fast networks ... and On slow networks ... are both un-checked, and Use this authentication ... is Basic Authentication.

On the client, if i browse to https://{my FQDN}/RPC/ I get asked for my credentials three times then I get a 401.3 error, which is good. If I run "Outlook.exe /rpcdiag" I get asked for my credentials, various things flash and change, then I get four lines of "... disconnected".

Plus one of my users is going to Israel on Friday, where VPN connectivity is iffy and/or blocked, and she hates OWA.

What more can I do?
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