How Microsoft Put Purview Priority Cleanup Together and How it Works

For years, Microsoft has told us that items held by retention policies or eDiscovery holds are immutable and cannot be removed. Well, that's not quite the case as proven by the launch of the Purview Priority Cleanup solution, which is able to find and remove held items (only in Exchange Online for now). There's lots of interesting technology to discuss, but I wonder if Priority Cleanup is too complex and a tad slow to succeed.

https://practical365.com/how-microsoft-put-purview-priority-together-and-how-it-works/