Table of Contents
This guide provides a clear overview of apps, including the main concepts, practical steps, and common questions. Use it to understand the topic, compare the available options, and make a more informed decision.
Back in mid-June, Microsoft revealed that the new Outlook platform would begin to replace the Mail and Calendar apps on Windows 10 and 11, with a roadmap lasting until September 2024.
After receiving backlash from many Microsoft 365 users about the above timeframe, the Redmond company has decided to step back a bit on the roadmap and say that the new Outlook will replace the Mail and Calendar applications sometime before the end. 2024 without disclosing a specific date.

However, it seems likely that a small portion of Microsoft 365 subscription accounts will be automatically switched from using Mail and Calendar to the new Outlook much sooner than planned. According to a recently released internal announcement in the Microsoft 365 Admin Center, some users will be 'piloted' by Microsoft to migrate to the new Outlook in a few weeks.
'At the end of August 2023, Microsoft will also begin the process of automatically migrating Mail and Calendar app users to the new Outlook for Windows platform, with the option to undo if desired. Users can return to the current Mail and Calendar apps by clicking the toggle button available in the new Outlook'.
The announcement adds that Microsoft 365 users will see more and more notifications in the Mail and Calendar apps, saying these apps will be officially decommissioned at the end of 2024.
The new Outlook for Windows app is essentially built on top of the Outlook.com web app, with a significantly overhauled design over the old Outlook app, and integration with other Microsoft 365 services. also significantly improved.
Conclusion
Understanding Apps makes it easier to compare options, avoid common mistakes, and apply the information in this guide more effectively. Review the relevant requirements before making changes or choosing a solution.
FAQ
What is Apps?
The new Outlook for Windows app is essentially built on top of the Outlook.com web app, with a significantly overhauled design over the old Outlook app, and integration with other Microsoft 365 services.
Why is Apps important?
Understanding Apps helps you evaluate features, compatibility, performance, and potential limitations before you choose a product or follow a procedure.
What should you consider when using or choosing Apps?
Consider your specific goal, compatibility requirements, available features, cost, security, and the practical recommendations described in this guide.
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