We’ve all used the UK Government Web Archive by The National Archives. It’s a great way of viewing a snapshot of a website at a particular moment in time. I’ve used it myself for compiling screenshots of a site’s redesign history.
Do we need something similar on our intranets? Is there a case for going back to a snapshot of the intranet at a particular date? I think there is. And it usually boils down to legal reasons where evidence is required to settle a dispute or clarify information.