If you receive an email from Office 365 with the subject: "Action Required: Renew..." and it looks like this:
This is likely from an MS Team, or MS Planner Plan, that you created. Every team or group that you create in Office 365 has to be renewed every 6 months to keep it going.
Solution: You can renew it by clicking the button "Renew group" (one-click action). Or if you no longer need it, you can let it expire and delete the email. Important: Once you click the button it should not ask you to login. If it does ask you to login, do not do it, as it is likely phishing. If you are not sure, please forward it to techsupport.