401 - Unauthorized access error

[Bharathy Mohan]

Hi,
I recently installed latest SP 2.4.3 win 64 on a sandbox and the testing went well. However when we implemented the same on a stage Windows 2008 (IIS 7.5) server some users are facing the below error and I don't see anything logged in the log file. This happens after they logon to the Idp and when Idp post the information. In some cases this happens even before showing the Idp. The below URL was displayed in the IE when this error was displayed. Please advise.

URL 1:
https://ucastage82.sumtotalsystems.com/Shibboleth.sso/Login?SAMLDS=1&target=ss%3Amem%3A9cd0b3fc3525c440b2d6106e4235b1c6ba9ad870&entityID=urn%3Amace%3Aincommon%3Aucop.edu

URL 2:
https://ucastage82.sumtotalsystems.com/Shibboleth.sso/SAML/POST

Error displayed in IE:
Server error:
401 - Unauthorized: Access is denied due to invalid credentials.
You do not have permission to view this directory or page using the credentials that you supplied.

Thanks,
Bharathy Mohan.

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