Quote:Microsoft announced this week that it is going to install the new Outlook application on Windows 10 systems automatically.  Windows users and administrators who do not want the app need to make changes to their systems using the Registry and PowerShell to block the new Outlook client; this can only be done after it has been installed.

Microsoft plans to retire the classic Outlook application for Windows and already retired the Mail and Calendar applications on Windows in favor of the new Outlook client. Not all users and organizations are happy with the change. Proton, known for its mail service and other products, stated last year that the new Outlook was Microsoft's newest data collection service. Some users dislike the new Outlook for its lack of features and also because it contains ads.

The details:

• The new Outlook will be installed alongside the February 2025 security updates.
  
• The update is released on February 11, 2025.
  
• The new client is also included in the preview update, which will be released on January 28, 2025.
  

No way to prevent installation of new Outlook on Windows 10

Microsoft says that there is no way to prevent the new Outlook from being installed. In other words, if the February 2025 security updates are installed on a Windows 10 PC, the new Outlook is installed on the system as well. Since Windows updates are cumulative, future updates will also include the new app.

Administrators may remove and then block the new Outlook application, but only after its initial installation according to Microsoft.

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