giuliob170 Sure thing. Here are answers to your questions:
Q: Do the premium features require creation of a new plan?
Creating a new plan is an easy way to get the new capabilities. Also, there is a new feature rolling out that will allow you to to upgrade an existing basic plan, which effectively transforms the plan and tasks into a new premium plan.
Q: Can users who have Microsoft 365 but do not have a P1/P3/P5 license still access the tasks in the plan?
Yes, Microsoft 365 users still have the ability to modify tasks in premium plans the same way they could in a basic
plan. This means that they have edit access to capabilities like assigning a task, changing a task’s start or
finish dates, or adding an attachment to a task. The additional license will be required to view and edit premium
capabilities like Gantt charts or goals. You can see the list of capabilities by license at https://learn.microsoft.com/office365/servicedescriptions/project-online-service-description/project-web-service-description.
Check out the Ask Me Anything event on Tuesday, September 17th at 9am Pacific Time if you have any additional questions. More info here: The new Microsoft Planner: What’s New and What’s Coming Next - Microsoft Community Hub