It's not clear-cut in the sense that Munich's IT landscape was and is fragmented which made and makes it very easy to blame IT problems on LiMux. But that doesn't make me believe even for one second that Microsoft didn't lobby their way back to Munich. Here's a little story from some years back about Microsoft's lobbying efforts to prevent usage of ODF as a standard in the UK:
https://www.computerweekly.com/news/2240234078/Government-op...