Outlook Rich Text options must be set for converting to plain text format.

Overview

Finding ID	Version	Rule ID	IA Controls	Severity
V-71279	DTOO344	SV-85903r1_rule		Medium

Description
Outlook automatically converts RTF formatted messages that are sent over the Internet to HTML format, so that the message formatting is maintained and attachments are received. This setting controls how Outlook sends Rich Text Format (RTF) messages to Internet recipients.

STIG	Date
Microsoft Outlook 2016 STIG	2016-12-02

Details

Check Text ( None )
None

Fix Text (F-46947r1_fix)
Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Outlook Options -> Mail Format -> Internet Formatting "Outlook Rich Text options" to "Enabled: Convert to Plain Text format".