[zomgwat]

Check out OneNote. Its shared notebooks should scale to 25-50 users. At a past employer, we used OneNote successfully at that scale instead of a wiki type solution. OneNote has a decent Mac app so it works in environments with both Windows and Macs.

My biggest gripe is the lack of native code block support. There are ok workarounds but something native would be better.

Edit:

> By law we are not allowed to use a cloud solution.

Missed this on my first read. Shared notebooks should be able to be stored wherever you store things in your network.