!!! Overview
[{$pagename}] [AttributeType] contains previous [SIDs] used for the object if the object was moved from another [AD DOMAIN]. 

Whenever an object is moved from one [AD DOMAIN] to another, a new [Security Identifier] is created and that new [SID] becomes the [objectSID]. The previous SID is added to the [{$pagename}] attribute.

!! More Information
There might be more information for this subject on one of the following:
[{ReferringPagesPlugin before='*' after='\n' }]