Check current situation
Use usage data for role definition
You can use the system trace function (transaction ST01) to record the authorization checks in all modes, if the trace and the transaction to be traced run on the same application server. All object fields and their values are recorded during the authorization object check.
Do this once in your system. For example, you can jump from the MM50 transaction to the MM01 transaction without explicitly assigning transaction startup permission to the MM01 transaction through the S_TCODE authorization object. You can see this call in your System Trace for Permissions in the Additional Information column for testing. There you can see that the CALL TRANSACTION call has disabled the permission check. The user is allowed to jump into the transaction MM01, although in the role assigned to him Z_MATERIALSTAMMDATEN only permissions for the transactions MM03 and MM50 are recorded.
SAP license optimization
Create a message to be displayed to the user when permissions checks fail. The tests in this User-Exit are relatively free. This allows you to read table entries, store data from the ABAP application's memory, or read data that is already there. However, you are limited by the interface parameters of the application. In our example, these are the BKPF and BSEG structures and the system variables. If the information from the interface parameters is not sufficient for the test, you can use your programming skills and knowledge about the interdependencies of substitution and validation in finance to find additional data. The following coding allows you to identify the selected offset document entries that you can find in the POSTAB table (with the RFOPS structure) in the SAPMF05A programme. This way you can find many additional data. It is important that the supporting programme processes the User-Exits.
If you get into the situation that authorizations are required that were not considered in the role concept, "Shortcut for SAP systems" allows you to assign the complete authorization for the respective authorization object.
The website "www.sap-corner.de" offers a lot of useful information about SAP authorizations.
Both parameters must be activated in order to ensure traceability at the user level as well as at the table level.