Before you can connect to a host mainframe computer from the workstation, you must specify an authorized user ID and password that is approved for mainframe access.
If your upload/download preferences are set correctly, CICS® BAC lets you enter the user ID and password once and have it automatically applied each time you connect, as long as you do not end the client session on the workstation. The user ID and password are not saved on the workstation between client sessions. To specify a user ID and password for mainframe connections: