My wife uses Outlook (but not Teams) on her 2021 M1 MBP and there is some sort of leak. Her SSD fills up with swap files or something, and restarting gives her back 90GB of space. Literally. It is crazy.

I don't know if it's Outlook though. I have similar issues with my Intel MBP, and I don't use Outlook. I slowly drain from 20GB available down to 2, and then I have to restart. It's like living in the early 2000's, restarting all the time.