Planner sends email and push notifications for a variety of reasons. Some notifications can be controlled by plan members, and others by group owners. If you use Planner in Teams, additional notifications are provided by Teams, where they can also be managed.

This feature allows you to access your previously downloaded or synchronized email messages, calendar information, contacts, and tasks without an internet connection. Certain types of accounts, such as POP accounts, store their information in the Outlook Data File (.pst) format.