Top right of main window.
Status offline.
Option to switch offline/online greyed out
Option to change server greyed out
(Although apparently it’s set to automatic and presently “west europe” @21ms)
have signed out and signed back in
have checked xbox server status (and signed into that to check)
When multiplayer is turned off it greys out and vice versa. Didn’t do so before…but turn it on (General options - data - multiplayer) and you can access them again…
There are loads of different servers that the .exe connects to during gameplay.
Even if you have all online functionality disabled it’s still connecting to stuff. (Validation I guess)
So, the multiplayer servers likely only host player data (alt, speed, course, aircraft type etc) while entirely different servers are streaming the photogrammetry, bing maps, weather, ATC voices etc.