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Authorization Check in
the Business Transaction 
An authorization is the authorization to carry out a specific action in the SAP System.
Business transaction processing in SAP CRM is protected by an authorization check based on alternatives, so that only authorized users can create, change display, or delete a business transaction.
The authorization check in the business transaction uses the functions available from Basis. This means that specific authorization fields and objects exist, and the user’s corresponding authorizations are derived from the role assigned to him.
You can find general information on the authorization concept in the SAP Library under SAP NetWeaver ® SAP Web Application Server ® mySAP Technology Components ® SAP Web Application Server ® Security (BC-SEC) ® Users and Roles (BC-SEC-USR).