esaProbeScheduleGroupProbeList is a read-create DisplayString (1 to 512 characters) holding a comma-separated list of esaProbeName values that all share this group's single schedule. An administrator maintains this list to add or remove which specific probes are governed by one shared start/stop schedule, instead of configuring timing on each probe separately. For example, adding a newly created probe's name to this list immediately puts it on the same nightly test schedule as the rest of the group, with no separate timing configuration needed on the new probe itself.