Policy
Hide the “Try the new Outlook” toggle in Outlook
This policy setting controls whether the “Try the new Outlook” toggle is displayed in Outlook. If you enable this policy setting, the toggle for “Try the new Outlook” will be hidden and users will not have the ability to switch between the existing and new Outlook experiences. If you disable or do not configure this policy setting, the toggle for “Try the new Outlook” will be displayed. Note: This policy only applies to subscription-based Microsoft 365 Apps.
6e091dec604d L_HideNewOutlookToggle Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\outlook\options\general\hidenewoutlooktoggle (enabled) = 1
HKCU\software\policies\microsoft\office\16.0\outlook\options\general\hidenewoutlooktoggle (disabled) = 0Policy notes
This policy setting controls whether the “Try the new Outlook” toggle is displayed in Outlook. If you enable this policy setting, the toggle for “Try the new Outlook” will be hidden and users will not have the ability to switch between the existing and new Outlook experiences. If you disable or do not configure this policy setting, the toggle for “Try the new Outlook” will be displayed. Note: This policy only applies to subscription-based Microsoft 365 Apps.