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
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. By default, Outlook allows users to subscribe to Internet calendars. When an organization has policies that govern the use of external resources such as Internet calendars, this feature will enable users to violate those policies.

Description

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. By default, Outlook allows users to subscribe to Internet calendars. When an organization has policies that govern the use of external resources such as Internet calendars, this feature will enable users to violate those policies.

STIG	Date
Microsoft Outlook 2016 STIG	2016-07-28

Details

Check Text ( None )
None

Fix Text (F-46938r1_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".