Blocking Hours in Outlook

Suppose you need to step out of the office to pick up your kids, this animation shows you how you can schedule that appointment.

Create a new event.
Fill out the details, but remember, Lisa won't read what you're doing so you need to,
Mark that appointment to "Show As" busy.
Save the appointment but remember to DECLINE any conflicting appointments. After Lisa has mentioned an appointment to you, she assumes the ball is in your court to decide if you can make it. She doesn't want to bother you by nagging you or reading your private schedule.

Remember to DECLINE appointments you can't make, even during blocks. Blocks only stop new invitations!