Good workaround which I am familiar with from the days of FSX (in which both options worked reliably anyway), but not really how it’s supposed to work, I would imagine. There are still weird things it does using this (like not even using the “atc_id” option in the aircraft.cfg file anyway, and using something spurious which I can’t work out from where it originates) so I don’t think it’s working properly at all.
Having said that… I now can’t seem to sign in and use MSFS at all due to the Xbox server issues, so let’s hope it was something related to that… 