You can extend permissions for an Administrator user role to "manage user account" permission of the Manager/Unit Manager/Administrator role in the subscription except for the POC user.
Note: This feature needs to be enabled for your subscription. Contact your Qualys TAM or Qualys Support.
Follow these steps if you are in need to manage specific user permissions:
1) Log in through the Administrator user.
2) Navigate to Users > Users, and select the user.
3) Click the Edit option from the Quick actions menu.
4) Go to the Permissions tab and select/deselect the "Manage User Accounts" checkbox for the Manager/Unit Manager role.