CUA is basically for managing the users centrally from one location .
The identification of a CUA system is in SU01 screen if u observe u will get a new tab called " SYSTEMS " in which all the child systems list will be mentioned .
There will be no systems tab if CUA is not installed . According to SAP recommendation SOLMAN system should be used as a CUA parent system , since SOLMAN will have all the data about the systems in the landscape . So there is no need to setup RFC connections in the landscape .
But in some organizations this can be setup in ECC systems , then we need to configure things from scratch . That I will cover in setting up CUA in a lanscape .
Advantages of CUA :
IF the company's landscape has multiple systems and a request came to setup 1000 users in all the systems . Easy solution is CUA in one shot we can setup multiple users in one shot in different systems .
For a single user u want reset a password in 10 different systems , no need to go to each every system and reset ,CUA one shot . Again it depends on the settings .
Settings in CUA :
We do the settings of CUA in SCUM tcode . We can see different options there .
For Eg : U can lock the user locally and globally same case with Password , role assignment , license etc .
After doing any thing through we need to process the SCUL entries . These are Idocs to be moved to target system . In any mass user creation phase sometimes it requires to move them manually . Otherwise just need to check them .
Need docs on how to setup CUA mail me .