Microsoft Outlook 2010 Security Technical Implementation Guide

The Microsoft Outlook 2010 Security Technical Implementation Guide (V1 R14) has 85 STIG checks. New to STIG checklists? Read What is a STIG checklist?, CKL vs CKLB, and STIG vs SCAP benchmark.

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Severity

Version

V1 · R14

CurrentPublished Thu Jan 30 2025

Default message format must be set to use Plain Text.

Microsoft Outlook 2010 Security Technical Implementation Guide

Assessment Title

Rule Text

Default message format must be set to use Plain Text.

Description

Discussion Text

Outlook uses HTML as the default e-mail format, but users can choose a format other than the default when composing messages. This setting controls the default message format in Outlook.

New to STIG checklists? Read What is a STIG checklist? and CKL vs CKLB.

Objective

V-242100

Rule

SV-242100r961863_rule

Severity

medium

Rule Version

DTOO314 - Outlook

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

The policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Outlook Options -> Mail Format -> Internet Formatting -> Message Format "Set message format" must be "Enabled: Plain Text".

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

HKCU\Software\Policies\Microsoft\Office\14.0\outlook\options\mail

Criteria: If the value EditorPreference is REG_DWORD = 65536 (dec), this is not a finding.

Implementation Procedure

Fix Text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2010 -> Outlook Options -> Mail Format -> Internet Formatting -> Message Format "Set message format" to "Enabled: Plain Text".

STIG check 78 of 85 in the Microsoft Outlook 2010 STIG checklist

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