SCCM device collection for computers with no boundary group

For troubleshooting purposes, you might want to  create a device collection for computers that are not assigned to a boundary group. In SCCM Current Branch version 2002 this is possible.

Create a device collection using this query:

select SMS_R_System.ResourceId, SMS_R_System.ResourceType, SMS_R_System.Name, SMS_R_System.SMSUniqueIdentifier,
SMS_R_System.ResourceDomainORWorkgroup, SMS_R_System.Client from  SMS_R_System where SMS_R_System.ResourceId in
(select resourceid from SMS_CollectionMemberClientBaselineStatus
where SMS_CollectionMemberClientBaselineStatus.boundarygroups is NULL)
and SMS_R_System.Name not in ("Unknown") and SMS_R_System.Client = "1"

 This will return all machines that do not have a boundary group assigned to them.

Source: http://eskonr.com/2020/04/how-to-create-a-collection-based-on-boundary-group-for-client-assignment-and-content-troubleshooting/