Search: Find Users Not in Role A
Find the ID of the role in the URL when opening the role in role detail view
Go to users > switch to advanced search mode
Add this code (adapt the ID)
CODE
-userRoles.userRoleId:1b611edb400c403498113523f1127580sThen you may batch edit the users and assign the role they did not have before.
The ID is shown in the URL in the Role Detail View.
VIDEO: How To Search with Query for User Role