During the coexistence, you must use Lotus Notes to book the rooms. The eventual home for all conference rooms and other Lotus Notes managed resources is Office 365. By the end of the migration and coexistence period (year-end 2016), all the rooms and resources will be 100% managed in O365. You will receive additional communication notifying you when your rooms are moved to O365. At that time, you will no longer need to use Notes for conference room reservations (note: South America already uses an independent system, so they will continue to use that until the end when we will put all their resources in O365).