A Calendar task is the same as any other Any.do list task. An event is for listing events like birthdays. Microsoft has Outlook, a power email and calendar management app used by users.

1. As a follow-up to the flag, the email is also added to the To-Do List in the Tasks tab. Also within the Tasks tab is Tasks. Tasks are items you create from scratch. They are not tied to an email message and you can add important details to your task.
2. Microsoft To Do. To Do gives you focus, from work to play.

There's overlap, for sure. It gets asked all over the internet and it really depends on your situation which will work best.

Microsoft Outlook Tasks

We have a staff of 80 and I'll focus on a group of 10 people. I can't get them to understand anything beyond Outlook. OneDrive? I have to continually do 1-on-1 for them to learn how to share, what that means, why/how it's different from traditional network shares.

Outlook 2016 Task Management

We're re-exploring Teams right now. Slack was a fail. Skype is understood but not used by many, and only for video meetings. Planner was a dud. In my whole career I can remember only 1 person using To-Do as a daily tool.