Central User Administration
Using central user administration (CUA), you can maintain user master records centrally in one system. CUA distributes changes automatically to the child systems. CUA enables you to have an overview in the central system of all user data in the entire system landscape.
Distribution of the data is based on a functioning application link enabling (ALE) landscape. Data is exchanged in a controlled manner and is kept consistent. An ALE system group is used by central user administration to distribute user data between a central system and child systems linked by ALE. Familiarize yourself with basic information about the ALE integration technology.
CUA data is distributed asynchronously between the application systems in an ALE environment. Asynchronous distribution ensures that the data still reaches the target system even if it was unreachable when the data was sent.
One system in the CUA ALE environment is defined as the central system. The central system is linked with every child system in both directions. The child systems are not linked to each other, except for the central system, which is itself a child system, from the point of view of CUA.
Use the most up-to-date system in your system landscape as your central system. In this way, the newest functions in CUA are available to you.
See also Chapters 10 and 11 of R/3 Authorization Made Easy 4.6A/B by SAP Labs Inc. R/3 Simplification Group.
