Blocking time off using the calendar availability
To block off dates or times in Sesami, you will need to delete/remove the availability from your schedule.
Navigate to: Sesami > Team > [Click on a team member] > Availability
Click on the dates that you want to block off or adjust the time accordingly.
Blocking time off using google calendar sync
If you have google calendar sync enabled under: Sesami > Team > [Click on a team member] > Advanced > Google Calendar Sync
Simply use your google calendar to block off times as you would normally on a calendar and it would reflect accordingly in your Sesami availability.
Please make sure that the time block you create is marked as "busy"!