STIGQter: STIG Summary: Microsoft Exchange 2019 Edge Server Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 30 Jan 2025:

Exchange internal send connectors must use domain security (mutual authentication Transport Layer Security).

DISA Rule

SV-259594r1043178_rule

Vulnerability Number

V-259594

Group Title

SRG-APP-000219

Rule Version

EX19-ED-000098

Severity

CAT II

CCI(s)

• CCI-001184 - Protect the authenticity of communications sessions.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-SendConnector <'IdentityName'> -DomainSecureEnabled $true

Note: The <IdentityName> value must be in quotes.

Repeat the procedure for each send connector.

Check Contents

Open the Exchange Management Shell and enter the following command:

Get-SendConnector | Select-Object -Property Name, Identity, DomainSecureEnabled

For each send connector, if the value of "DomainSecureEnabled" is not set to "True", this is a finding.

If the "TlsAuthLevel" parameter is set to "DomainValidation" then the "TlsDomain" parameter is required if "DNSRoutingEnabled" parameter is set to "$false".

The "DNSRoutingEnabled" parameter must be "$true" If the value of "DomainSecureEnabled" is "$true".

Vulnerability Number

V-259594

Documentable

False

Rule Version

EX19-ED-000098

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

Get-SendConnector | Select-Object -Property Name, Identity, DomainSecureEnabled

For each send connector, if the value of "DomainSecureEnabled" is not set to "True", this is a finding.

If the "TlsAuthLevel" parameter is set to "DomainValidation" then the "TlsDomain" parameter is required if "DNSRoutingEnabled" parameter is set to "$false".

The "DNSRoutingEnabled" parameter must be "$true" If the value of "DomainSecureEnabled" is "$true".

Check Content Reference

M

Target Key

5579