This policy setting allows you to remove all Intermediate store certificates. The certificates in the Intermediate certificate ...

"This policy setting allows you to remove all Intermediate store certificates. The certificates in the Intermediate certificate store are used for authentication such as SSL.  If you enable this policy, then all certificates in the Intermediate certificate store are removed. Note: ensure that you are not removing certificates which may interfere with normal device operation.  If you disable this policy, then existing device Intermediate certificates will remain provisioned on the device.  If you do not configure this policy, then existing device Intermediate certificates will remain provisioned on the device."