Publishing to a Web Distributed and Authoring (DAV) server must be prevented.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-228430	DTOO217	SV-228430r508021_rule		Medium

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.

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.

STIG	Date
Microsoft Outlook 2016 Security Technical Implementation Guide	2022-03-11

Details

Check Text ( C-30663r497612_chk )
Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Outlook Options -> Preferences -> Calendar Options -> Office.com Sharing Service "Prevent publishing to a DAV server" is set to "Enabled". Procedure: Use the Windows Registry Editor to navigate to the following key: HKCU\Software\Policies\Microsoft\Office\16.0\outlook\options\pubcal Criteria: If the value DisableDav is REG_DWORD = 1, this is not a finding.

Check Text ( C-30663r497612_chk )

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Outlook Options -> Preferences -> Calendar Options -> Office.com Sharing Service "Prevent publishing to a DAV server" is set to "Enabled".

Procedure: Use the Windows Registry Editor to navigate to the following key:

HKCU\Software\Policies\Microsoft\Office\16.0\outlook\options\pubcal

Criteria: If the value DisableDav is REG_DWORD = 1, this is not a finding.

Fix Text (F-30648r497613_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Outlook Options -> Preferences -> Calendar Options -> Office.com Sharing Service "Prevent publishing to a DAV server" to "Enabled".