Hi
A GPO-like approach only uses group policy to show only private stores.
Applies to Windows 10 Enterprise, Windows 10 Education.
Microsoft Store app will still be available, but employees can't view or purchase apps. Employees can view and install apps that the admin has added to your organization's private store.
To show private store only in Microsoft Store app
1.Type gpedit in the search bar, and then select Edit group policy (Control panel) to find and start Group Policy Editor.
2.In the console tree of the snap-in, go to User Configuration or Computer Configuration > Administrative Templates > Windows Components, and then click Store.
3.Right-click Only display the private store within the Microsoft Store app in the right pane, and click Edit.
This opens the Only display the private store within the Microsoft Store app policy settings.
4.On the Only display the private store within the Microsoft Store app setting page, click Enabled, and then click OK
Best Regards,
Wesley Li