Active directory users rollback

Because you are asking this, this leads me to wonder why? 

Each migration session creates or modifies an object. The undo task, undoes what the migration session did. So if it created the object it will delete the object. If it wrote two attributes, it will undo those two attributes putting the prior values back. 

You have to navigate to the session to to undo each object. 

Thank you for your reply. The migration started in 2019 to migrate and rename 25000 users, its several departements

At the begining it was migration and renaming.

Right now the want to migrate as it is without renaming the account.

Some migrated accounts were used (no rollback) but the NOT USED ACCOUNT at the destination I wave to rollback them around 4500

Thank you

Thank you for your reply. The migration started in 2019 to migrate and rename 25000 users, its several departements

At the begining it was migration and renaming.

Right now the want to migrate as it is without renaming the account.

Some migrated accounts were used (no rollback) but the NOT USED ACCOUNT at the destination I wave to rollback them around 4500

Thank you

So that is the task at hand. But why roll them back? Simply because they don’t need to be renamed? Or because they do not need to be migrated at all?