Web Sequential Scheduling

Is the scope of the parallel option limited to other jobs in the same schedule, or all jobs across all schedules?

I just want to ensure that a prune job in its own schedule with -exclusive access (obviously not set to run in parallel) will not end up in conflict with a backup job in a different schedule.

I ran a small test with two check jobs for their respective storages, each in their own individual schedules set to start at exactly the same time, and the second scheduled check did not start until immediately after the first finished, like it was queued (I can’t seem to find a way to reorder schedules).

No, this is only within the same schedule.

To run prune in exclusive mode manually disable all other tasks (turn off all days they are scheduled to run on).

One rarely if ever needs exclusive mode, so there is no simple way to do it.