I have two offices. They are not both working at the same time and so we take the practice with us, generally as a backup. Anyone billing or scheduling in the office that is not seeing patients, can just log in remotely to book the appointment or find info needed. It has worked well for us. Backups are much quicker since version 6.3. Logging in remotely is just too slow to manage office hours. I guess it would be an issue for multiple providers but it really would depend on volume I imagine.
Nancy