CICS® provides the PEM server, the receive side of APPC PEM as a CICS transaction that is started when an ATTACH for the sign-on transaction program is received from the PEM client.
CICS retrieves the sign-on data associated with the request, calls the ESM to perform a sign-on, and retrieves sign-on details for the userid. If the sign-on data includes a new password value, CICS includes this value when it calls the ESM to request a sign-on.
If PV is being used, and sign-on completes correctly, the user is added to the PV "signed-on-from list" in CICS, and the PV "signed-on-to list" in the PEM client. The "signed-on-"lists keep track of verified user IDs.
The CICS PEM server builds a reply and returns it to the PEM client, after which the CICS PEM server transaction terminates normally.