Mail & Calendar Apps Will Be Replaced with New Outlook for Windows December 2024

There is an error in a Microsoft instruction page discussing how to disable the "Try New Outlook" Toggle. The link is: https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-on-the-web/enable-disable-employee-access-new-outlook#us-the-registry-to-enable-or-disable-the-new-outlook-toggle-in-outlook-desktop and the error is in the Registry Dword. It says to set it to 1 to enable the toggle and to 0 to enable it. That is backwards. It must be set to 1 to disable the "Try New Outlook" toggle in Outlook Desktop. You also have to reboot after you change a registry setting.

There is a Message Center Notification referencing the erroneous web page above:

https://admin.microsoft.com/AdminPortal/home?ref=MessageCenter/:/messages/MC676298

These are the entries on the page that show the dWord values are backwards:

Copy the one of the following text blocks into Notepad:

Enable the New Outlook toggle in Outlook Desktop: This value shows the Try the new Outlook" toggle in Outlook Desktop, if it's available in your update channel:

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Options\General]
"HideNewOutlookToggle"=dword:00000001
Disable the New Outlook toggle in Outlook Desktop: This value hides the Try the new Outlook" toggle in Outlook Desktop:

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Options\General]
"HideNewOutlookToggle"=dword:00000000

Save the file as .reg in a location that's easy to find. For example: C:\Data\Disable New Outlook toggle in Outlook Desktop.reg or C:\Data\Enable New Outlook toggle in Outlook Desktop.reg.

Run the .reg file and select Yes in the confirmation dialog that appears.