To remove or reinstate constituent's in mass, they must first be placed in to a group in Constituent360.
  • Create a Query to identify the constituents that need to be removed and add the Query results to a group.
  • If the constituents were removed or created in error by an import or data sync operation, then the system should have automatically created a group that can be used. Search the day of the sync in Constituent360 to find it (MM/DD/YYYY).
Please Contact Support and reference this article. Also provide the name of the group (and the group ID if possible) that contains the removed constituents that are to be reinstated.