EDF in dual-screen mode and started transactions

If an EXEC CICS START command (without TERMID) is executed under control of EDF in dual-screen mode, CICS also performs a surrogate user check, to verify that the userid for the EDF terminal is authorized as a surrogate user of the userid for the started transaction. This check is done even if USERID is omitted, if the started-userid is different from the EDF userid.

Surrogate user checking can be subject to link security. If EDF is in use in dual-screen mode, the security of the user executing EDF is also checked. If a NOTAUTH condition occurs with an EXEC CICS START command, this can be because of link security or because of EDF user security.