Allow Message Service Cloud Sync

This policy setting allows backup and restore of cellular text messages to Microsoft's cloud services.

Supported on: At least Windows Server, Windows 10 Version 1709
Registry HiveHKEY_LOCAL_MACHINE
Registry PathSoftware\Policies\Microsoft\Windows\Messaging
Value NameAllowMessageSync
Value TypeREG_DWORD
Enabled Value1
Disabled Value0

messaging.admx

Administrative Templates (Computers)

Administrative Templates (Users)