ISSUE

Example scenario:

Things get changed in an AD structure, namely adding new OUs and moving users around into different OUs as well.

Afterwards, you want to delete and resync all users and groups in TTA but since there is no feature for bulk deletion of users and groups, you would need to delete each and every user and group singlehandedly. 

SOLUTION

Currently, there is no out-of-the-box feature that enables the bulk deletion of groups/group resources within TotalAgility. This could be automated using a custom script that incorporates the relevant APIs to delete resources. See for further information; TotalAgility: ResourceService Class Reference

Also, this was raised as an Enhancement Request 2262955:Bulk Deletion Of Users And Groups Via UI