Do not sync on metered connections
Supported on: At least Windows Server 2012, Windows 8 or Windows RT
Registry
HKLM
Software\Policies\Microsoft\Windows\SettingSync Value name: DisableSyncOnPaidNetwork
Enabled: DisableSyncOnPaidNetwork = 1
Disabled: DisableSyncOnPaidNetwork = 0
Description
Prevent syncing to and from this PC when on metered Internet connections. This turns off and disables "sync your settings on metered connections" switch on the "sync your settings" page in PC Settings. If you enable this policy setting, syncing on metered connections will be turned off, and no syncing will take place when this PC is on a metered connection. If you do not set or disable this setting, syncing on metered connections is configurable by the user.