If accounts were added on the computer, they'll be migrated automatically. When setup completes, OneDrive will start. While the per-user option installs OneDrive for each user account on a PC under the %localappdata% folder, the per-machine option will install OneDrive under the 'Program Files (x86)' or 'Program Files' directory (depending on the OS architecture).

Run 'OneDriveSetup.exe /allusers' from a command prompt window (this will result in a User Account Control prompt) or by using Microsoft Endpoint Configuration Manager.

The per-machine installation option provides automatic transitioning from the previous OneDrive for Business sync app (Groove.exe). The per-machine installation option supports syncing OneDrive and SharePoint files in Microsoft 365 and in SharePoint Server 2019. The per-machine installation's system requirements will be the same as the per-user installation. If you're moving from per-user to per-machine, update settings aren't affected. More info about the sync app update process.

The OneDrive sync app with the installation option of either per-machine or per-user both use the same release notes, support the same update rings, and update in the same time-frame. Other than where the sync app is installed, the behavior is the same. This option is especially useful for computers with multiple users and for when you don't want executable files running from a user profile. With the per-machine installation option, you'll only need to install the app once on a PC. By default, the OneDrive sync app installs per-user, meaning that you'll need to install the app for each user on a machine.

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