Documentation for Microsoft App Agent DD replication configuration?

The following is an excerpt from the Microsoft App Agent documentation:

To enable the backup replication and subsequent restore from a secondary Data

Domain system, the user ID or primary group ID of the DD Boost users on the primary

and secondary systems must be identical.

You must meet specific configuration requirements to enable the restore of replicated

backups from a secondary Data Domain system.

The Knowledgebase Article number 456734, titled Configuration of DDBoost Users on

Source and Destination DDRs for MTree Replication, provides more details. The article

is available on the Support website at https://support.emc.com.

That's great - except the Support site can't find that KB number or that doc title.

So - where are the instructions for this configuration?

All comments/feedback appreciated - thanks.