Thanks for the reply,We've ~4.5millions user currently stored in
external system and which is going grow. We might not want to overload
the repository with users instead keep all our user in current
centralized source system. 1. In this case, is there any best practice
to store users outside AEM without syncing the users back with AEM? 2.
How to support the content authorization, should we store groups inside
AEM OR content authorization can be achieved without having users/groups
in AEM.