GPO for Real-time collaboration options

Office 365 ProPlus should allow to configure some settings with Group Policy. I need to deploy the "Real-time collaboration options" >  "When working with others, I want to automatically share my changes:" > "Always" to enable real-time collaboration.

https://support.office.com/en-us/article/Collaborate-on-Word-documents-with-real-time-co-authoring-7dd3040c-3f30-4fdd-bab0-8586492a1f1d?ui=en-US&rs=en-US&ad=US

I found a registry that deals with "show names on presence flags" but nothing for the respective drop-down menu population

HKCU\Software\Microsoft\Office\16.0\Word\Options\AlwaysShowNamesOnPresenceFlags = 1