Code, Scheduler Job Header

This field is intended for free use with a codeunit. Its contents depend on the codeunit with which it is to be used.

When modifying the Scheduler for specialized adptations it may be necessary to have certain fields available for use and set of these fields has been created for convenience.
If you have Codeunit 99001561 set up in your system you can see how some of the fields are used.