Every product team had preferred tools. Most of the time similar tools were used across Microsoft. For bug tracking, we used an internal tool called Product Studio.
You can read more about that here.
For source control, we used Source Depot. Not sure if it is still being used. I heard Windows moved to Git a few years ago.
Often internal products turn into external products. The culture has improved significantly since Satya took over.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.