Hi Abhishek,
In Simple words we can define UME as below.
It is User Management Engine for all your Java Stack systems.
When you install Java system then you can configure UME to different data sources like ABAP stack,Java Database or LDAP etc.
So whatever UME source you configure(ABAP,Java Database ,LDAP) all you users in Java will automatically adminstered in that particular source.
Suppose you have configured your UME to point to ABAP stack to client 200 or 500
then all you Java users like j2ee_admin , admonistrator etc can be adminstered by logging into that particular client(locking unlocking etc).
what is its use and if in our landscape we don't have Java then do we still require UME ??
UME is a concept which is bundled in Java stack and will only be present if you are planning to implement Java system.
Configuration of UME:
You first need to decide when you are planning to implement Java stack and which data source you will choose - ABAP(Configure) , Java Database(by default) , LDAP(Configure).
Thanks and Regards,
Kunal Gahlot