For the life of me, I had really problems figuring out how to force comments from the developers when they do a checkin in TFS 2010. As I recall from TFS 2005, it was quite easy to setup, but that was not the case in TFS 2010!
Googling the matter also lead to a lot of desperate guys trying to solve the same problem. Well – finally I managed to locate the setting:
How to do:
1) Find “Team Project Settings”
2) “Source Control…”
3) Enter Check-in Policy tab
5) Select “Changeset Comments Policy”
You are done!