I have a need to bring two existing Business units into one. I have all of the standard tracking data stored in them both (Linked by a parent). I would like to be able to maintain all of the data but I can't see a way of being able to get this all into one. Users would want to be able to filter based on last sends etc. Is there a way to achieve this?
You will have to store the data in Shared Data Extensions since the data is on two separate business units.
Understand that if you have subscribers in one business unit that are not in the other, you will not be able to join the tracking data but you can still have a consolidated view of tracking data.