Microsoft's Germany headquarter moved from Unterschleißheim (near Munich, still Landkreis München, opened 1983) to Schwabing (suburb of Munich) last year. Did you mean that moving closer to the city, about 10km, was a reason?

I think they just confused bavria with munich. It was the city who had their own linux distribution (LiMux) and the move of the headquarters where part of microsoft efforts to change that, because it means more tax income for the city (Munich is not part of the disctrict Landkreis München).