3.1.4.17.13 Subscribe for Event Notification
The server passes RpcImpersonationAccessToken.Sids[UserIndex]) and a pointer to the IWbemObjectSink object to the provider. The provider performs a security access check on the client's identity, validating that the client has WBEM_RIGHT_SUBSCRIBE permission. If the provider does not want to grant access to the client, it returns WBEM_E_ACCESS_DENIED to the server through IWbemObjectSink::SetStatus.