One of my colleagues pointed out a really cool trick for quickly adding all the calendars of your team members to your Outlook client without having to look each one up individually.
In your Outlook calendar, go to Calendar Groups > Show Manager’s Team Calendars:
Once you do that, you’ll see a new group in your calendar that includes all the team members who report to your manager:
You can then select one or more people and have their calendars show up alongside yours:
One Minute Office Magic 