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One Outlook has been leaked

Andres Bohren

2022-05-17

Hi All,

Microsoft works since a while at “One Outlook”, a simplified Outlook Client based on OWA. There has been a leak from an early Version and i’ve downloaded and installed it.

The Setup is very short and after a few seconds you are promted with a Login Dialog.

There is an Option for Import (but i skipped it)

That’s how it looks like

If you want to block the Login with the new Client you can do that with the following Exchange Online cmdlet

Get-CASMailbox -Identity a.bohren@icewolf.ch | fl *enabled*, *disabled*
Set-CASMailbox -Identity a.bohren@icewolf.ch -OneWinNativeOutlookEnabled $False

After that OneOutlook can’t be used.

One Outlook is based on OPX (OWA Powered Experiences) which depend on Edge WebView2 and renders diffrent Parts of OWA in a new Window.

Things to know about the new Outlook for Windows

Project Monarch “One Outlook” Build Leaks

Regards
Andres Bohren

Andres works as a Senior Microsoft Cloud Engineer/Architect for midsize to large Enterprises at isolutions in Switzerland. He has a special focus on M365 including Identity, Messaging, Communication, Security and PowerShell but also some Azure Technologies. He is Co-Organisator of the Microsoft 365 Community Schweiz Meetup group, Co-Organizator of Swiss PowerShell User Group and was Speaker at several other Meetups or Conferences. He likes good Food, his Bike and nice Dive spots all over the World.