User Maintenance after HR-Org replication

Dear Community,

in a sandbox environment I am currently evaluating HR-SRM Org recplication connecting SRM 6.0 to a copy of an existing HR-system.

I already learned that after active HR-Org replication, I will need to maintain my users in HR directly.

Problem: I know SRM very well but have no clue about HR.

Anyone can tell me which transactions in HR to use to maintain an employee in a way that it will be usable in SRM after replication? I use ECC 6.0 based HR. Alternatively a useful link to the right note or documentation page is highly appreciated.

Thanks and greetings, Julian