What must you do if you want to enforce an additional authorization check when a...

To enforce an additional authorization check when a user starts an SAP transaction, you must assign the relevant authorization object and its permissions to the transaction code using transaction SE93. This transaction allows you to define or modify the properties of a transaction, including specifying authorization objects that must be checked when the transaction is executed. By linking the authorization object directly to the transaction in SE93, the system enforces the additional check at the point of transaction execution, ensuring that only authorized users can proceed. Transactions SU24 and SU22 are used for maintaining authorization defaults, but they do not directly enforce checks at transaction start, and S_START is specific to Fiori app authorizations, not general transactions.