Outlook (“Project Monarch”): New e-mail client can be tried out soon

Microsoft is internally working on a new Outlook for all platforms, also known as “One Outlook”, codenamed “Project Monarch” and later this year will have all the functions of an email client and calendar for Windows, macOS, iOS and iPadOS as well as Android and the web in a single app.

One Outlook for all platforms

Journalist Mary Jo Foley already had the website in January 2021 ZDNet reported on “One Outlook” and most recently the editor had Zac Bowden on Windows Central released the first screenshots of the new Outlook app, which are said to come from an internal Telegram group of developers.

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Image comparison: Light Mode (Image: Windows Central) Dark Mode (Image: Windows Central)

The images are said to come from the still closed beta, which will soon be made public and later available for the following platforms:

  • Windows 11 and Windows 10
  • macOS Monterey
  • iOS, iPadOS
  • Android

The web interface of should not only be adapted, but also expanded. “One Outlook” is intended to bundle all the functions of an e-mail client and a calendar in a “web app” interface on the desktop. The implementations for Windows 11 and Windows 10 should make the beginning, before macOS, iOS, iPadOS and Android will follow later.

The new Outlook (“Project Monarch”)
The new Outlook (“Project Monarch”) (Image: Windows Central)
The new Outlook (“Project Monarch”)
The new Outlook (“Project Monarch”) (Image: Windows Central)

The corresponding setup.exe for the installation routine of the new e-mail client can already be downloaded from the Microsoft server, but currently requires an account for schools or universities.

This fact is expected to change soon, as Microsoft itself announced just a few hours ago.

We are aware that some users are able to access an unsupported early trial version of the new Outlook for Windows.

This release is missing some of the features and improvements that will later be available to our customers in the beta channel.

We recommend our customers to wait for the release of the beta version. We expect to share more news about our beta release in the coming weeks.


With this message, Microsoft particularly wants to address administrators who are already using the “closed beta” of the new Outlook app, and thus presumably prevent further “leaks” before the open beta phase.

The new Outlook (“Project Monarch”)
The new Outlook (“Project Monarch”) (Image: Windows Central)

The open beta and the final version of “One Outlook” will be released later this year for the x86_64 architecture as well as for Apple Silicon and other ARM platforms.

Outlook replaces Mail and Calendar

Microsoft is said to be planning an announcement of “One Outlook” for spring, gradually replacing the mail client and calendar integrated in Windows 11 and Windows 10. In the rumor mill, the autumn 2022 update aka Windows 22H2 (“Sun Valley 2”) is mentioned again and again as a possible first customer for the new Outlook.

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