Without Windows 11 systems being managed, devices could be rogue and become targets of an attacker.
Check
Verify the Windows 11 system is receiving policy from either group Policy or an MDM with the following steps:
From a command line or PowerShell:
gpresult /R OS Configuration: Member Workstation
If the system OS Configuration is set to "Member Workstation", the system is being managed by GPO.
If the system OS Configuration is set to "Standalone Workstation" and is not being managed by GPO, ask the administrator to indicate which MDM is managing the device.
Issue to the following for Intune. Note: Intune must be running at time of command.
From PowerShell: Get-Service -Name "IntuneManagementExtension"
This should return the following result:
Status = Running, Name = IntuneManagementExtension, DisplayName = Microsoft Intune Management Extension
If Intune is not installed, the response will include "ObjectNotFound" and/or "NoServiceFoundForGivenName".
If the Windows 11 system is not receiving policy from either group Policy or an MDM (that is running), this is a finding.
Fix
Configure the Windows 11 system to use either Group Policy or an approved MDM product to enforce STIG compliance.