If I preassign someone for a particular ministry, is there a chance they will be auto-scheduled for that ministry outside of the preassignment time if I do not check the box to only schedule them as preassigned?
I have volunteers who want to be preassigned as Ushers for a particular month. But they volunteer for other ministries that use the auto-scheduler. I didn't want to set them to only be preassigned because then they wouldn't ever be scheduled for the other ministries.
If you do not check the "Manual and preassigned scheduling only" box, then there is a chance the program auto-schedules volunteers for other positions outside of their preassignments.
In your example if you want them to only be preassigned for Usher but then available to the auto-scheduler just for non-Usher ministries, what you can do is set them as a substitute in the Usher ministry. The preassignment will schedule them as an Usher anyways, and then because they are a sub the auto-scheduler will never place them in that ministry, but they will still be open for the auto-scheduler to use them in other roles.