1. Account Sync

If using a live account, Microsoft will automatically upload your account data to their servers. Disable this.

Danger

After every major windows update, verify these settings.

Disable user account sync

Disable account sync and prevent users from turning it on.

GPO

Computer Configuration › Administrative Templates › Windows Components › Sync your settings › Do not sync

☑

ENABLED

☐

Allow users to turn syncing on

Updated: 2021-02-19 Reference

Registry

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\SettingSync

DisableSettingSync

DWORD

2

Updated: 2021-02-19 Reference

Registry

HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\SettingSync

DisableSettingSyncUserOverride

DWORD

1

Updated: 2021-02-19 Reference