You can try below steps:
- Add Role via Windows Server Manager: Web Server (IIS) --> Web Server --> Security --> URL Authorization.
- Open the IIS Manager, now you will see Authorization Rules.
- Click on the right side panel: Add Allow Rule...
- Under Specified roles or user groups type the name of the AD group you need.
<configuration>
<system.webServer>
<security>
<authorization>
<remove users="*" roles="" verbs="" />
<add accessType="Allow" roles="ADGroup" />
</authorization>
</security>
</system.webServer>
</configuration>
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