There's plenty of reporting to be found if you just search "munich linux".
From the end of [0]:
> At the time Munich began the move to LiMux in 2004, it was one of the largest organizations to reject Windows, and Microsoft took the city's leaving so seriously that its then CEO Steve Ballmer flew to Munich, but the mayor at the time, Christian Ude, stood firm.
> More recently, Microsoft last year moved its German company headquarters to Munich.
From the end of [0]:
> At the time Munich began the move to LiMux in 2004, it was one of the largest organizations to reject Windows, and Microsoft took the city's leaving so seriously that its then CEO Steve Ballmer flew to Munich, but the mayor at the time, Christian Ude, stood firm.
> More recently, Microsoft last year moved its German company headquarters to Munich.
[0] https://www.techrepublic.com/article/linux-in-munich-no-comp...