Hi Malik,
Unfortunately, we cannot hide the "Switch User" option for just one specific AD account using User-level policies or Registry settings. Windows strictly enforces this as a machine-wide setting.
If you want to restrict that specific user without changing the policy for the whole machine, the easiest workaround is to block them from locking or logging off the computer. You can do this via User Configuration (applied only to that specific account):
- Remove "Lock": Blocks them from locking the screen to switch users.
- Remove "Logoff": Blocks them from logging out easily.
This effectively prevents them from switching accounts.
TV