STIGQter: STIG Summary: Microsoft Office 365 ProPlus Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 23 Apr 2021:

The Outlook Security Mode must be enabled to always use the Outlook Security Group Policy.

DISA Rule

SV-223359r508019_rule

Vulnerability Number

V-223359

Group Title

SRG-APP-000516

Rule Version

O365-OU-000014

Severity

CAT II

CCI(s)

• CCI-000366 - The organization implements the security configuration settings.

Weight

10

Fix Recommendation

Set the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Security >> Security Form Settings >> Outlook Security Mode to "Enabled (Use Outlook Security Group Policy)".

Check Contents

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Security >> Security Form Settings >> Outlook Security Mode is set to "Enabled (Use Outlook Security Group Policy)".

Use the Windows Registry to navigate to the following key:

HKCU\software\policies\microsoft\office\16.0\ outlook\security

If the value for adminsecuritymode is set to REG_DWORD = 3, this is not a finding.

Vulnerability Number

V-223359

Documentable

False

Rule Version

O365-OU-000014

Severity Override Guidance

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2016 >> Security >> Security Form Settings >> Outlook Security Mode is set to "Enabled (Use Outlook Security Group Policy)".

Use the Windows Registry to navigate to the following key:

HKCU\software\policies\microsoft\office\16.0\ outlook\security

If the value for adminsecuritymode is set to REG_DWORD = 3, this is not a finding.

Check Content Reference

M

Target Key

4099

Comments