Even though Microsoft just released their new version of the Advanced eDiscovery (AED2) interface, they seem to be releasing UI changes in relatively short development cycles. That is good if you are waiting for the Graph API functions to integrate with AED2, but bad if you already updated your protocols and documentation. This update changes the workflow for adding a Custodian or Data Source to your AED2 matter. Helpful screenshots below if you do not have admin access to the Message Center link given above. Just trying to help consumers keep up with the rapid pace of releases by the new PM team.