Microsoft To Do Tasks Disappeared

I have used and loved Google's task list software for a long time, and having just started at a new job that uses MS Office, I thought I would try Microsoft's task list. That was a huge mistake apparently. I set up a dozen tasks in my first few days to organize my thoughts and pending tasks for this new job, and now they're just all unceremoniously gone. I don't know why I trusted Microsoft when so much of their other software works so poorly.