STIGQter STIGQter: STIG Summary: Microsoft Exchange 2016 Mailbox Server Security Technical Implementation Guide Version: 1 Release: 4 Benchmark Date: 25 Oct 2019: Exchange Outlook Anywhere clients must use NTLM authentication to access email.

DISA Rule

SV-95445r1_rule

Vulnerability Number

V-80735

Group Title

SRG-APP-000391

Rule Version

EX16-MB-000610

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

For InternalClientAuthenticationMethod:

Set-OutlookAnywhere -Identity '<IdentityName'> -InternalClientAuthenticationMethod NTLM

For ExternalClientAuthenticationMethod:

Set-OutlookAnywhere -Identity '<IdentityName'> -ExternalClientAuthenticationMethod NTLM

Check Contents

Open the Exchange Management Shell and enter the following command:

Get-OutlookAnywhere

Get-OutlookAnywhere | Select Name, Identity, InternalClientAuthenticationMethod, ExternalClientAuthenticationMethod

If the value of "InternalClientAuthenticationMethod" and the value of "ExternalClientAuthenticationMethod" are not set to NTLM, this is a finding.

Vulnerability Number

V-80735

Documentable

False

Rule Version

EX16-MB-000610

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

Get-OutlookAnywhere

Get-OutlookAnywhere | Select Name, Identity, InternalClientAuthenticationMethod, ExternalClientAuthenticationMethod

If the value of "InternalClientAuthenticationMethod" and the value of "ExternalClientAuthenticationMethod" are not set to NTLM, this is a finding.

Check Content Reference

M

Target Key

3355

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