Process by ADPW

Hello,

Below are my questions:

Q1) My question is does ADPW process group membership only if source objects were members of target groups prior to the migration?

Q2) What would be possible scopes of target groups, if source objects were members of target groups prior to the migration?

Q3) Are there any other scenarios where process group membership by ADPW is applicable? Please elaborate.

Q4) What are other scenarios where I need to process by using ADPW? Please describe briefly.

Kindly reply and explain specific to above mentioned questions.