How do I block unavailable time?

Answer:

There are 2 ways to block unavailable time...

1. You can create a user called 'Unavailable' (or any name you choose) to block out the time.  When you create schedules for Unavailable, it will prevent others from scheduling that time period.  If you want those schedules to show up in red, you can make this user a 'Maintenance User' (from the User | Pilot/Personal page).   If you are authorized, you can make recurring schedules on a daily or weekly basis through a specified date.
2. Or, you can create a scheduling rule to block the time. These rules can be specified in the Scheduling Policies screen (Group Info | Sched Policies).  There you can specify the resource(s), the time span, days of the week, and an associated message to display.

Unavailable time scheduled with user

Below is an image of what the schedule would look like if the instructor was blocking their unavailable time with a user.

Blocking unavailable time

If the instructor has a regular schedule that they want to block without displaying it on the calendar, a system administrator can do this in the Scheduling Policy page.  Go to Group Info >> Sched Policies and click on 'Add Rule' as seen in the image below.  There the resource, timespan, days of the week and display message can be entered.

The image below shows the message that is displayed when this instructor resource with the after hour rule is attempted to be scheduled during the blocked time.