The current UPA shows 7000 users (including bunch of service accounts). I just added 4 exclusion filters so that number of users is back to 2000. I did a full sync but all the service accounts and junk accounts are still there and number is 7,000. Is there a way to empty the UPA DB without re-creating the entire UPA. It's a new SharePoint 2013 environment. Also user and group was selected under "configure sync settings" but i changed that to Users Only.
I am using UPSS Import.