Windows 2000 and Windows 2008 Storage Server do not show in forest topology. It is impossible to search events and\or install agents on these Operating Systems.
In ChangeAuditor 5.5 the ldap query used to enumerate the topology was changed from "(&(objectCategory=computer)(operatingSystem=*Server*))" to
This causes "Windows 2000 Server" and "Windows® Storage Server 2008 Standard" machines to not be identified and marked as 'deleted' causing overview, agent stats, and searches to not use this object.
This issus is resolved in ChangeAuditor 5.5.108 and higher.