PowerShell Command to block new Outlook Version Toggle not working.

Question

https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/outlook-on-the-web/enable-disable-employee-access-new-outlook

When using the above PS on a single mailbox it seems to work for about 24 hours then the button comes back. Any reason why this should not be working?

Answer 1

Hi @Nik West ,

Add the registry below on the user's machine so that the toggle can be hide:
(Important: Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.)

Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Options\General]
"HideNewOutlookToggle"=dword:00000001

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