STIGQter: STIG Summary: Microsoft Outlook 2016 Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Oct 2020:

Outlook must be configured to force authentication when connecting to an Exchange server.

DISA Rule

SV-228467r508021_rule

Vulnerability Number

V-228467

Group Title

SRG-APP-000395

Rule Version

DTOO280

Severity

CAT II

CCI(s)

• CCI-001967 - The information system authenticates organization-defined devices and/or types of devices before establishing a local, remote, and/or network connection using bidirectional authentication that is cryptographically based.

Weight

10

Fix Recommendation

Set the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Account Settings -> Exchange "Authentication with Exchange Server" to "Enabled (Kerberos Password Authentication)".

Check Contents

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Account Settings -> Exchange "Authentication with Exchange Server" is set to "Enabled (Kerberos Password Authentication)".

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 AuthenticationService is REG_DWORD = 16 (decimal) or 10 (hex), this is not a finding.

Vulnerability Number

V-228467

Documentable

False

Rule Version

DTOO280

Severity Override Guidance

Verify the policy value for User Configuration -> Administrative Templates -> Microsoft Outlook 2016 -> Account Settings -> Exchange "Authentication with Exchange Server" is set to "Enabled (Kerberos Password Authentication)".

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 AuthenticationService is REG_DWORD = 16 (decimal) or 10 (hex), this is not a finding.

Check Content Reference

M

Target Key

4224

Comments