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Outlook 2007 freezes using RPC over HTTPS

Hello,

A few weeks ago I implemented a front end/back end RPC over HTTPS scenario where neither one of the Exchange servers are domain controllers.

It worked great for 2-3 weeks, now my two users that use the RPC over HTTPS connection (and my own computer using a test account), Outlook 2007 freezes up.

I don't know what's going on but it has to get solved.


Servers stats:

RPC Proxy:
Microsoft Windows Server 2003 Standard Edition
P3 processor, 1 GB of RAM
Exchange 2003 SP2
With a trial cert, but I believe it is fully functional, from RapidSSL.com

BackEnd:
Microsoft Windows Server 2003 Standard Edition
Quad Core Xeon 2.9 GHZ, 4GB of Ram
Exchange 2003 SP2

Resource usage on both servers seems pretty normal.

Clients:
Windows XP SP2 (at least)
Outlook 2007

I checked bandwidth from both servers, and it's a T1 connection with about 2MB up and 2MB down from both servers.

This also happens on my own machine using a test account , at times when I would highly doubt the other two RPC over HTTPS users would be using their outlook.

I reboot the servers and it *seemed* to temporarily fix the issues but it went right back to having a problem again...

Problems are only with the two users using RPC over HTTPS, and not normal/internal Outlook users.

Please help!
ExchangeWindows XPWindows Server 2003

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Tom-J-Lael
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Tom-J-Lael
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ASKER

I have also switched the cert to another provider. Same issue.


On top of Outlook freezing, I get the "Outlook Is Requesting Data From the Server" message perpetually in the system tray.
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Tom-J-Lael
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ASKER

I have found this error on the client machines:

this happens everytime on reboot and started appearing on 6/29

 

Event Type: Error
Event Source: Schannel
Event Category: None
Event ID: 36870
Date:  7/21/2008
Time:  11:25:09 AM
User:  N/A
Computer: TOSHIBA-USER
Description:
A fatal error occurred when attempting to access the SSL server credential private key. The error code returned from the cryptographic module is 0x80090016.


Switching the SSL Cert did not seem to fix the issue.
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huntersvcs
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It may have something to do with the Protected Storage Service - see here (not your problem, but the same error code):  http://support.microsoft.com/kb/246183/en-us
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Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

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