Prevent publishing to a DAV server
Supported on: At least Windows Server 2008 R2 or Windows 7
Registry
HKCU
software\policies\microsoft\office\16.0\outlook\options\pubcal Value name: disabledav
Enabled: disabledav = 1
Disabled: disabledav = 0
Description
This policy setting controls whether Outlook users can publish their calendars to a DAV server. If you enable this policy setting, Outlook users cannot publish their calendars to a DAV server. If you disable or do not configure this policy setting, Outlook users can share their calendars with others by publishing them to a server that supports the World Wide Web Distributed Authoring and Versioning (WebDAV) protocol.