There are two sets of rules maintained by IdFix; Multi-tenant and Dedicated/ITAR. At this time, the two rule sets exclude the same objects, attributes, and attribute values from its search. This may change in future releases.
Multi-tenant and Dedicated error exclusions used by IdFix
This section lists the objects, attributes, and values that IdFix excludes from its search of the directory. The asterisk (*) is a wildcard that can be substituted for other characters.
distinguishedName contains “\0ACNF:”
Object contains the IsCriticalSystemObject attribute
Multi-Tenant and Dedicated objects and attributes checked by IdFix
The attributes that are checked for errors by IdFix are described in the section "Directory object and attribute preparation" in Prepare directory attributes for synchronization with Office 365 by using the IdFix tool.