@OttAnt This is a longstanding niggle with Planner. I can't believe that any member of a team/group can delete a task. There's no audit log that they've done so, no way of retrieving a deleted task, and no way of alerting the plan owner that it's been deleted. You can't create a workflow in Power Automate. It's so casual and unbusinesslike. I've worked on plans where I'm pretty sure tasks have been deleted, but it's impossible to prove. You'd have to take screenshots of your Planner board to save a snapshot on a particular date 