Create a Group Policy and a Group then assign the group to the Group Policy for Security Filtering.  Add users to the AD Group to start applying the policy.

NOTE:  When the policy is applied the "Try the new Outlook" toggle button disappears from the upper-right screen in Outlook.  If you remove a person from the group policy because you went the toggle back, you will have to manually edit their registry and change the value from 1 to 0.


Create a Group Policy

  1. Open Group Policy Management
  2. Right click Group Policy Objects and select New
  3. Type in the policy name "O365 Disable toggle for New Outlook" (do not select a starter GPO)
  4. Right click the newly created policy and select Edit
  5. Determine if this is a policy that follows the user or if it is a computer based policy (for this policy it is a user-based policy because we want the policy to follow the user and the registry key is in the Current User space
  6. Expand User Configuration - Preferences - Windows Settings
  7. Right Click on Registry, select New - Registry Item
    1. Action:  Update
    2. Hive: HKEY_CURRENT_USER (this should be the default)
    3. Key Path: SOFTWARE\Microsoft\Office\16.0\Outlook\Options\General
    4. Value name:  HideNewOutlookToggle   (Do Not place a checkmark beside "Default")
    5. Value type: REG_DWORD
    6. Value data: 1
    7. Base: Decimal
  8. Apply the settings and close the Group Policy
  9. Link the Policy to the Staff container, and remove any Security Filtering entries (this is added later for this policy)


Discussion at Jan 4th, 2024 User Services Meeting was to not force hiding the toggle button, but to create an AD group to place users in that will apply to the already created group policy.  The HelpDesk uses the toggle to 'kick' the mail into sending/receiving again at times, but always leaves the user in the Classic Outlook view.


Create AD user group and assign the group to the Group Policy

  1. Create a group in AD under Staff - Groups - Office365 - Disable_New_Outlook
  2. Assign the "Disable_New_Outlook" group to the group policy "O365 Disable toggle for New Outlook"
    1. Select the Group Policy "O365 Disable toggle for New Outlook"
    2. Under Security Filtering, select/search for the group "Disable_New_Outlook”
    3. Add users to the AD group, wait for the policy to kick in (should apply after a user logs out and back in), and it can take a good 30 to 90 minutes for the policy to apply.  If you are at the user's desk or remote with them, you can go to a command prompt and type gpudate /force to force the group policy to update..may have to run this a few times, depending on the policy update timing.