I use onenote as a personal note taking system.

For shared artifacts we use word, excel or PowerPoint in corporate onedrive and it works shockingly well, with minor but important caveats - you can't usually edit the same exact box at the same time, and it can get confused with offline changes by multiple people. But online changes by multiple simultaneous people seems to work really well. I especially enjoy when one person is presenting slides, an executive makes a suggestion, and another team member makes the change real time on the same deck and it shows up in presentation.

We are just starting to experiment with some shared onenote notebooks, it seems to have a bit more learning curve and needs more discipline and structure than the rest of ms office.