The Specific authorized resource option enables the client to access only those resources where an explicit association between the client and the resource exists.
Leave Specific selected (the default) to allow your application to acquire an access token with permissions based on an explicit association between the client and target services. Then, use the Add button to select the applications that your application references.
The Specific option is assigned by default to confidential applications created prior to Oracle Identity Cloud Service version 17.4.2. To use the All option, you must open the application from the Oracle Identity Cloud Service administration console, and then select All.