Alessandro,
Thanks for your reply 
After a long time. Hope you are doing good.
I think you are right. I was not able to get this and was wondering where these connectors are being picked up. Now, I think I am getting the idea.
But users are also available in Active Directory and this connector is also picked up while performing risk analysis. There is no sense to consider AD connector for risk analysis. May I know how I can ignore it?
Regards,
Faisal