What is the maximum number of passengers per booking in Concur?

One. If you have more than one passenger traveling together on the same flight you should utilize the cloning feature. After completing both reservations, it is recommended that you email UVA@cbtravel.com with both record locators and ask to have the reservations cross-referenced with the airline. This will make the airline aware that you are traveling together in case of schedule changes and other times when they need this information.