Allow time travel in the Microsoft graph
The Office graph contains an enormous amount of useful metadata (who is connected to who, which documents are beind read and so on).
But it's information is transient. We can only access the current state.
There are a wealth of information management, analytics, user adoption and reporting applications that would be enabled if we could "time travel" the office graph i.e. For any given query, know what the graph response is today and know what the graph response would have been at any given point in the past or for a specified time interval - essentially allowing us to add a time dimension to our graph queries and the api.