Steps need to be performed to set up the CUA:
Steps to Set Up the CUA
Below are the systems considered as an example to set up CUA:
Here, we will set system ABC (client 123) as a CUA central system(D16 is also refered as CUA system) and other systems(T16,PQR and XYZ) as child systems. As per this structure, we will proceed with above mentioned steps:
In a completely new system that is to be set up, an administration user needs to be created with which all further steps can be performed. To create such administrator user:
2. Specify Logical systems
In CUA landscape, SAP systems are identified with Logical system names. Due to this, Logical systems need to be created for every system which is going to be included in CUA landscape. This is one time task to be performed before setting up CUA. The Logical systems can be defined be following below steps:
In the same way, create the logical system name for the central system in all child systems.
D16 is CUA and it has T16 logical system in BD54
T16 is child and it has CUA D16 logical system in BD54
3. Assign logical systems to client
We need to perform this cross-client procedure only once for each SAP system as per below procedure:
Ex: – If we execute the t-code SCC4 in system ABC then, open the client 123 and maintain the logical system name as ABCCLNT123
Assign logical system name in scc4
4.Create system users
System users are required for the internal communication of the systems in an ALE group. These system users, defined in the target systems, are entered in RFC destinations in the calling systems.
Note: – No license fees apply to these system users.
To simplify the maintenance of system users, use the following naming conventions:
Below are SAP delivered roles for system users which need to be copied to customer namespace before assigning them to system users.
Roles in Central system:
Roles in child system:
With these details, we need to create the respective users with their applicable authorizations in t-code SU01 as below:
5. Create RFC destinations
Till this step, we are ready with Logical systems and system users, Now, we need to create RFC connections between the systems as mentioned in below steps:
Note: – You must create the name of the RFC destination in capital letters.
In this way, we have created the RFC connections (with names identical to Logical system name of target system) in each SAP systems.
6. Create CUA
Till now, we have connected all the systems ABC, PQR and XYZ as in below figure:
Now, we will define the system ABC as CUA in this landscape as detailed in below steps:
In this way, we have defined the system ABC as central system. After completion of this step, you can no longer create user master records in the child systems.
SCUA IN D16
7. Set field distributor parameters
In Central User Administration, we can use the distribution parameters in transaction SCUM to determine where individual parts of a user master record are maintained.
Every input field of the user maintenance transaction SU01 has a field attribute that you set once in the central system with transaction SCUM during Customizing. To perform this customizing, perform the below steps:
The system displays the User Distribution Field Selection screen, with tab pages of the fields whose distribution parameters you can set. You can select the following options on the tab pages:
SCUM IN D16
8. Synchronization of company addresses
The company addresses are maintained in individual systems PQR and XYZ. To enable CUA to communicate properly you must ensure that at least the central system contains complete information about all valid company addresses. You then distribute this complete company address set to all child systems, meaning that there is a consistent status of company addresses in the entire CUA.
Steps:
SCUG IN D16
As soon as we have configured the CUA, the users from child systems need to be transferred to Central system so that we can see their authorization details (such as roles to be assigned to users for child system and the roles assigned to them). The procedure is given in below steps:
At this stage, the CUA set up is completed.
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