I know this is a silly question to ask, but I just want to make sure before I pull the trigger.

I'm about to update our AD login credentials, and it warns that "On importing, existing data will be overwritten and new data will be added."

I'm assuming that means current configurations remain the same though right?  If someone is logging in with their AD creds as a technician, his current roles + support groups won't get overwritten and need to be setup again?