We have a main and branch office, seventy and twelve users respectively, that use the same email domain. The main office is using Exchange 2013. We are upgrading hardware in the branch office so using it as an opportunity to rationalise the topology. For simplicity I would like the branch office users to log into the main office Exchange server rather than have to administrate two Exchange servers. Is this feasible or would it be an unacceptable user experience? We have several remote users already accessing the main site Exchange using Outlook cached mode and it seems quite successful. Is there a best practice for this scenario?