Bookings with me

I have a G5 account. I have two users that were able to setup "Bookings with me" for their accounts. When I try to set one up I keep getting "You do not have access to Bookings with me" and the OWA version does not give me the option to create, but only "Go to my booking page", which is telling me I need to have my admin reenable this. What do I need to do to get this working?