Microsoft Outlook 2016 Security Technical Implementation Guide

The Microsoft Outlook 2016 Security Technical Implementation Guide (V2 R4) has 64 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

V2 · R4

CurrentPublished Mon Jan 05 2026

Outlook must be configured not to prompt users to choose security settings if default settings fail.

Microsoft Outlook 2016 Security Technical Implementation Guide

Assessment Title

Rule Text

Outlook must be configured not to prompt users to choose security settings if default settings fail.

Description

Discussion Text

Check to prompt the user to choose security settings if default settings fail; uncheck to automatically select.

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

Objective

V-228473

Rule

SV-228473r961863_rule

Severity

medium

Rule Version

DTOO315

Documentable

false

IA Controls

NIST SP 800-53

Rev 5

Assessment Procedure

Check Text

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security "Prompt user to choose security settings if default settings fail" is set to "Disabled".

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

HKCU\Software\Policies\Microsoft\Office\16.0\outlook\security

Criteria: If the value ForceDefaultProfile is REG_DWORD = 0, this is not a finding.

Implementation Procedure

Fix Text

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Security "Prompt user to choose security settings if default settings fail" to "Disabled".

STIG check 55 of 64 in the Microsoft Outlook 2016 STIG checklist

← Previous · V-228472Automatically downloading enclosures on RSS must be disallowed.Next · V-228474 →Outlook minimum encryption key length settings must be set.