Event ID 8306 when you activate Security Token Service Application

• 4/12/2019
• 2 minutes to read
• Contributors
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Symptoms

In SharePoint Foundation 2010, you may experience one or more of the following symptoms:

• You will see the message "The requested service, 'http://localhost:32843/SecurityTokenServiceApplication/securitytoken.svc/actas' could not be activated" in the application event logs of the servers.
• Users will not be able to log in to SharePoint sites that are using claims authentication.
• SharePoint internal operations that rely on claims authentication will not function correctly.

Cause

This problem can be caused if one or more of the following conditions are true:

• The .NET trust level for the secure token service is not set to "Full" in IIS.
• The application pool for the secure token service is not started or is using invalid credentials.

Resolution

​In order to resolve this problem, you can try one of the following possible solutions:

• From IIS Manager, click on the SecureTokenServiceApplication. In the "Features View", double click on .NET Trust Levels. Ensure that the trust level is set to "Full"
• From IIS Manager, ensure that the application pool for SecureTokenServiceApplication is running. By default, the name of the application pool is SecureTokenServiceApplicationPool.