The exam content for Group Policy processing stresses User Group Policy loopback processing for session hosts (RDS/AVD): "In environments like Remote Desktop Session Host (or Azure Virtual Desktop), enable loopback processing on the OU that contains the session host computers so that user settings from that GPO apply when users log on to those computers, regardless of the user's own OU." The requirement states:
"Apply GPO4 to the Azure Virtual Desktop session hosts. Ensure that Azure Virtual D esktop user sessions lock after being idle for 10 minutes. Users must be able to control the lockout time manually from their client computer." The idle-lock is a user configuration setting that must apply when users sign in to the session hosts, not to their personal devices. Therefore, enable loopback processing (Merge/Replace) in GPO4, which is linked to the VirtualDesktops OU containing the session hosts. Using security filtering or Enforced cannot make user settings in GPO4 override the user's own OU without loopback. Loopback ensures the AVD hosts impose the 10-minute lock for sessions, while leaving users free to set their own client device policies independently-fulfilling least-impact design.