How to have ADS Account be updated via the synchronization?

We have a number of users in ADSAccount that need to reconcile with AD domain although the users' account in AD domain has not updated. We reset the revision number on ADSAccount only and kick of the synchronization but those users were not updated via the sync (OIM 8.1.1). Not sure if reset the revision number on both user and adsaccount would make difference.  How to have ADS Account be updated via the synchronization? Thank you for the suggestions.