Windows Authentication – user cannot login

Possibly save 2 hours of your time: When your new application uses windows authentication, typically you will authorize against a specific windows security group. Once you launch your application and users are starting to access this website, but they try to login with their windows credentials but still have no access.

First, go to the website on IIS, right click on the website and choose Edit Permissions. Then go to Security tab and click on Edit. Then Add the windows security group with the Read permission and any other required permissions.

Second, you can get them to logout of their windows machine and then log back in.

Third, if that doesn’t work, then you can send them the following instructions and have them check if they are part of an assigned windows security group.

  • Run command prompt
  • Type: GPRESULT /R > gp.txt
  • Type: notepad gp.txt
  • Search for windows groupname in the txt file

On Windows 10, use the following command instead:

  • Type: GPRESULT /USER username /V > gp.txt
  • Type: notepad gp.txt

IIS 10: Web Apps, Security & Maintenance (IT Pro Solutions)


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