Return
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Title
Log in to Web portal with AD account fails with "HTTP 401 Unauthorized Error" -
Description
The web portal is configured to use "Active Directory user account (role based)" as the Authentication module, with "Employee (role based)" as a fall back. However, when trying to log in to the web portal with Single Sign-On (SSO) with the Active Directory (AD) account, the Kerberos prompt is presented to user:
After entering correct username and password, the user is presented with the 401.1 Error page:
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Cause
In this case the Service Principle Name (SPN) was not configured. -
Resolution
Configure the Service Principal Name (SPN) for the server hosting the web portal as per the following:
Kerberos with Service Principal Name (SPN)