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Update control-install.md
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Updates to reflect the fact that new Outlook will now be inboxed on Windows 10 devices.
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jhollanderms authored Jan 7, 2025
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Expand Up @@ -56,9 +56,9 @@ More details are available in [Enable or disable access to the new Outlook for W

## Block new Outlook preinstall on Windows

Windows builds after 23H2 have the new Outlook app preinstalled for all users, as it will replace the preinstalled Mail and Calendar apps by the end of 2024.
**Windows 11**

Currently, there isn't a way to block the new Outlook from being installed before it's first installed as a replacement for the Mail & Calendar app. If you prefer not to have new Outlook show up on your organization's devices, you can remove it after it's installed as part of the update.
Windows 11 builds after 23H2 have the new Outlook app preinstalled for all users. Currently, there isn't a way to block the new Outlook from being installed - if you prefer not to have new Outlook show up on your organization's devices, you can remove it after it's installed as part of the update.

To remove the app package, use the [Remove-AppxProvisionedPackage](/powershell/module/dism/remove-appxprovisionedpackage) cmdlet with the *PackageName* parameter value `Microsoft.OutlookForWindows`. After removal, Windows updates won't reinstall new Outlook.

Expand All @@ -76,6 +76,33 @@ HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe

For any device that installed the March 2024 Non-Security Preview release (or later cumulative update) for Windows 11 Version 23H2, Windows Orchestrator respects the deprovisioning cmdlet and it's not necessary to remove this registry value.

**Windows 10**

The new Outlook for Windows will be automatically installed on Windows 10 devices as part of the optional Windows 10 release on January 28, 2025, and more broadly released as part of the monthly security update release for Windows 10 on February 11, 2025.

Currently, there isn't a way to block the new Outlook from being installed - if you prefer not to have new Outlook show up on your organization's devices, you can remove it after it's installed as part of the update.

To remove the app package, use the [Remove-AppxProvisionedPackage](/powershell/module/dism/remove-appxprovisionedpackage) cmdlet with the *PackageName* parameter value `Microsoft.OutlookForWindows`.

Use the following command in Windows PowerShell:

```PowerShell
Remove-AppxProvisionedPackage -AllUsers -Online -PackageName (Get-AppxPackage Microsoft.OutlookForWindows).PackageFullName
```

You will also need to add this reg value:

```console
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsUpdate\Orchestrator\UScheduler_Oobe\OutlookUpdate
```
Then add a REG_SZ registry setting, named BlockedOobeUpdaters, with a value of ["MS_Outlook"].


After removal, Windows updates won't reinstall new Outlook.


**User Installs**

In cases of user installs, for example, if users used the toggle to install the new Outlook for Windows, use [Remove-AppxPackage](/powershell/module/appx/remove-appxpackage). The AppxPackage cmdlets are used for managing applications for current users, while AppxProvisionedPackage cmdlets are used for managing default applications for both current and future users of the system.

Use this Windows PowerShell command to remove the new Outlook for Windows for all users:
Expand All @@ -89,7 +116,7 @@ Remove-AppxPackage -AllUsers -Package (Get-AppxPackage Microsoft.OutlookForWindo
## Block new Outlook installation as part of Mail and Calendar deprecation

Users can switch to new Outlook from the Mail and Calendar apps included with Windows. Support for Windows Mail and Calendar ends on December 31, 2024. We're automatically switching active users to the new Outlook app.
Users can switch to new Outlook from the Mail and Calendar apps included with Windows. Support for Windows Mail and Calendar ended on December 31, 2024. We're automatically switching active users to the new Outlook app.

If you would like to block your users from acquiring the new Outlook from Windows Mail and Calendar applications, you can uninstall these apps from the user's devices.

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