Steps

  1. Go to Enterprise applications > Freshservice Provisioning > Edit attribute mappings.
  2. Under Mappings, select Provision Microsoft Entra ID Users.
  3. In the mapping table, click Delete next to department.
  4. Save.

From now on, department is not synced. Microsoft Entra ID does not clear departments that are already in Freshservice. Remove those by hand.

Sources

  • KB: Syncing Departments from Microsoft Entra ID