Hi Michael,
You might need to contact Microsoft support. Although I have written some steps here - ensure to check To-Do app.
https://www.yourwindowsguide.com/2026/02/outlook-hacked-draft-email.html
I’m eager to hear back and work together to find a solution.
A Windows MVP writes content on the above website, so it is safe. However, do watch out for the ads. It should translate into your Browser language automatically.