Using Room Finder (Outlook)

In Outlook, top right corner you will see "New Items"

From the drop down list select "Meeting"

There will be pop out 


At the top you will see some options 

You will need click into "scheduling Assistant" 

Select "Add Rooms"

You will get a lost of rooms to select from 

Select the room you want to book


This will tell you if there are any conflicts

You will then double click the room you want, this will add it into the meeting ensuring it does not get double booked