Is the Bot Framework deployed in any particular region? I want to avoid any unnecessary latency when connecting my app service with the MBF, and if the MBF is only hosted in 1 region, North Europe for example, then I would also deploy my app service in North Europe.
I got this answer off MS via other channels, in Nov 2017:
Bot Framework is hosted world-wide. Posts you make to the bot framework connectors are routed using traffic manager to the nearest datacenter to you (DNS wise). We're additionally adding more Azure regional deployments; 2 in Australia, one in brazil, and additional deployments in West Europe and East Asia respectively.