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Internet calendar integration in Outlook must be disabled.


Overview

Finding ID Version Rule ID IA Controls Severity
V-71263 DTOO285 SV-85887r1_rule Medium
Description
This policy setting allows you to determine whether or not you want to include Internet Calendar integration in Outlook. The Internet Calendar feature in Outlook enables users to publish calendars online (using the webcal:// protocol) and subscribe to calendars that others have published. When users subscribe to an Internet calendar, Outlook queries the calendar at regular intervals and downloads any changes as they are posted. If you enable this policy setting, all Internet calendar functionality in Outlook is disabled. If you disable or do not configure this policy setting, Outlook allows users to subscribe to Internet calendars.
STIG Date
Microsoft Outlook 2016 Security Technical Implementation Guide 2016-11-02

Details

Check Text ( C-71649r2_chk )
Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Account Settings -> Internet Calendars "Do not include Internet Calendar integration in Outlook" 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\webcal

Criteria: If the value Disable is REG_DWORD = 1, this is not a finding.
Fix Text (F-77681r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Account Settings -> Internet Calendars "Do not include Internet Calendar integration in Outlook" to "Enabled".