Hi,
For your 2 questions:
1,To view who has permissions, you can use the command :Find-AdmPwdExtendedRights
Find-AdmPwdExtendedRights –Identity “OU Name”
2,Based on my research, there is not such a command to remove the permission, we need to do it in another way:
Open Active Directory Users and Computers as an account with Domain Admin rights
Right click on the OU in question and select Properties
Click on the Security tab
Click Advanced
Select the user or group to modify permissions for
Click Edit
Uncheck the All extended rights box
Fan