I have noticed that FMS14 will not host a FM15 file unless the minimum version is set to allow v14. If the minimum version is set to 15 the file will upload but will not open. Is this historically normal behavior? I never tired this with FMS13 and a FM14 file.
I would assume that it should host the file as it is fmp12 and that FMS14 would ignore and server side specific tasks that were only allowed in 15.