Steps To Setup Kerberos For Windows Authentication

Step 1: Open Command prompt in Administrator mode.

Step 2: Execute the following command on it to add Service Principal Name(SPN) for the account:


setspn -a HTTP/## Server FQDN## ##Domain Service Account##
Example: C:\Users\Administrator> setspn -A HTTP/mini.example.com gpadmin

Note: "mini.exmaple.com" here is FQDN. Make sure it's resolvable on the Windows server running AD service.


Step3: Open Active Directory Users and Computers.

Step4: Search for the service account which was used to create the Service Principal Name (SPN).

Step5: Navigate to the Delegation tab.

Step6: Select Trust this user for delegation to any service (Kerberos only).


Step7: Click Apply.

Step8: Open up IIS Manager.

Step9: Select the site which you want to apply Windows Authentication to.

Step10: Select the Application Pool for that website. Right click on it and select Advanced Settings.


Step11: Use Custom Account and set the account as the service account for which delegation was enabled. You would need to enter the password of the service account as well.



Step12: Navigate to the Authentication section for the website.



Step13: Enable Windows Authentication and disable Anonymous Authentication.(Both cannot work simultaneously).


Step14: Go to the Configuration Editor



• Search for: system.webServer/security/authentication/windowsAuthentication


Step15: Set useKernelMode as False and useAppPoolCredentials as True in the Configuration editor.

Step16: Click Apply

Step17: Restart IIS server