Policy
Turn off file synchronization via SOAP over HTTP
This policy setting controls file synchronization via SOAP over HTTP for Word. If you enable this policy setting, file synchronization via SOAP over HTTP is turned off for Word. If you disable or do not configure this policy setting this policy setting, file synchronization via SOAP over HTTP is turned on for Word. Note: Turning off file synchronization via SOAP over HTTP will also prevent co-authoring and adversely affect the behavior of SharePoint Workspaces.
6bd83fc67911 L_TurnOffFileSynchronizationViaSOAPOverHTTP Registry
Copy registry mappings
HKCU\software\policies\microsoft\office\16.0\common\internet\fsshttpoffword (enabled) = 1
HKCU\software\policies\microsoft\office\16.0\common\internet\fsshttpoffword (disabled) = 0 Policy notes
This policy setting controls file synchronization via SOAP over HTTP for Word. If you enable this policy setting, file synchronization via SOAP over HTTP is turned off for Word. If you disable or do not configure this policy setting this policy setting, file synchronization via SOAP over HTTP is turned on for Word. Note: Turning off file synchronization via SOAP over HTTP will also prevent co-authoring and adversely affect the behavior of SharePoint Workspaces.