This is specific to DIRMAINT's auditing. DIRMAINT writes an audit record for every directory entry that gets changed and during DIRMAINT's end-of-day processing, it sends a file
to any user who has had their directory entry updated, notifying them of the changes made.
DIRMAINT keeps these audit records for a 3-month period and sends the end user a notification of that change each time its housekeeping tasks are run. We believe this to be configurable but IBM will know for certain.
So, the directory update that was recently made to SYBCOM is what triggered all of this.
When DIRMAINT's housekeeping runs at midnight, it checks its AUDIT disk for any directory updates that have been made and then sends those users a notification of such.
That's what SYBCOM is receiving from DIRMAINT each night and causing the COM220W warning. SYBCOM expects a job file, not something like this from DIRMAINT.
You may want to contact IBM and ask them how to prevent DIRMAINT from sending a file to every user whose directory gets updated.
You may also want to consider deleting SYBCOM's audit file from DIRMAINT's audit disk (or wherever it keeps these records), that way, none of this will occur.