Update: Bloomberg Business is now corroborating the earlier WSJ story, adding that the two companies are in talks to create "a version of the Android mobile-operating system that's more friendly to Microsoft services".
Original Story: According to the WSJ, Microsoft may be one of a handful of companies investing in Cyanogen. Cyanogen started off as a customized version of the Android operating system named CyanogenMod back in 2009 but has grown to a business of 80 people named Cyanogen, Inc. starting in 2013. The company co-launched their version of the Android OS on the OnePlus One smartphone in 2014.
Now, Cyanogen is looking for money, and Microsoft is reportedly putting cash into the company as a minority investor.