After this new year 2023 it has happened to me more frequently that when I started the simulator, I was left in the window with the message “syncing data”. I have read many posts about this, and the solution of logging out of the MS Store and Xbox etc. worked for me once, until one day the simulator would not start no matter how many times I restarted it. That’s why after some thought I came up with the idea of checking if I had in the task manager any application that could create a conflict.
In order not to extend this too much the solution I found was the following one:
Check that you don’t have MSFS open, if so, close it.
Open the task manager (CTRL+SHIFT+ESC).
Find the “Gaming Services” application and close it.
Start MSFS and enjoy your flight, without having to reset it or restart the pc.
I don’t know why it has happened to me many times this month of January, after that first time I have done those steps every time I got “stuck” and it has worked without any problem.
I hope I have helped someone!