Now I did a complete deinstall and a fresh install on my PC.
Result: MS FlightSim Server are not reachable, the FS want’s to start an update and stops with this error.
So now I did EVERYTHING so solve this issue, without success
–>> MS SERVER ARE NOT REACHABLE !!!
MS FIX YOUR SERVER IN GERMANY!
And my internet is OK, otherwise i could not write this post!