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Invalid User Authorization - The user authentication passed to the platform is not valid [solved with IIS restart]

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About 2 or 3 times a week, we get this issue on our on-premise CRM 4 install. Any attempt to access the site returns the "Invalid User Authorization - The user authentication passed to the platform is not valid" error message.

I know what the fix is - a simple IIS stop and start on the CRM box and it works fine right away. Based on the other information I have found concerning this error message, I don't understand why this is happening. None of our Active Directory users are changing, and no configuration changes are being made to the system. So it seems like a random problem.

Does anyone know what might be causing this and/or how to prevent it?

Friday, June 17, 2011 3:44 PM

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Does this happen randomly for one user or multiple users? If one, you can check the user's box to ensure CRM is in the trusted sites and ensure the user does not have Windows user login information stored on his or her machine. Here's a link to help with managing Windows credentials. Look toward the bottom of the article if users are not running Windows 7.

http://www.techrepublic.com/blog/window-on-windows/manage-network-logon-credentials-in-microsoft-windows/2734
Regards, Donna
- Proposed as answer by Curt Spanburgh MVP ModeratorMVP, Moderator Wednesday, June 22, 2011 7:55 PM
- Marked as answer by Jamie MileyModerator Wednesday, February 15, 2012 4:50 PM
Friday, June 17, 2011 4:00 PM

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I have never ran into this one. I don't know that I would look directly at CRM as the culprit. I think it might be an issue that involves either the CRM server box itself, it's configuration, or it's interaction with the surrounding network topology.

Maybe you could tell me a little more about your CRM installation. Number of Seats? Rollup Number? I guess any information could be helpful.

It might help to install the newest rollup.

Jamie Miley
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Friday, June 17, 2011 3:56 PM

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Does this happen randomly for one user or multiple users? If one, you can check the user's box to ensure CRM is in the trusted sites and ensure the user does not have Windows user login information stored on his or her machine. Here's a link to help with managing Windows credentials. Look toward the bottom of the article if users are not running Windows 7.

http://www.techrepublic.com/blog/window-on-windows/manage-network-logon-credentials-in-microsoft-windows/2734
Regards, Donna
- Proposed as answer by Curt Spanburgh MVP ModeratorMVP, Moderator Wednesday, June 22, 2011 7:55 PM
- Marked as answer by Jamie MileyModerator Wednesday, February 15, 2012 4:50 PM
Friday, June 17, 2011 4:00 PM