The customization required for the mesg, write, and talk utilities is done at installation time. Likewise, part of UUCP customization is done at installation time. For more information, see Security requirements for ServerPac and CBPDO installation. In the past, these tasks were done with the FOMISCHO job from SYS1.SAMPLIB.

The FOMISCHO job remains available in SYS1.SAMPLIB for installations that cannot synchronize their security databases for the required user ID uucp and group IDs uucpg and TTY. To complete this customization step, these installations must run FOMISCHO against each system image.