STIGQter: STIG Summary: Microsoft Exchange 2016 Edge Transport Server Security Technical Implementation Guide Version: 2 Release: 2 Benchmark Date: 22 Jan 2021:

Exchange must have auto-forwarding of email to remote domains disabled or restricted.

DISA Rule

SV-221205r612603_rule

Vulnerability Number

V-221205

Group Title

SRG-APP-000038

Rule Version

EX16-ED-000040

Severity

CAT II

CCI(s)

• CCI-001368 - The information system enforces approved authorizations for controlling the flow of information within the system based on organization-defined information flow control policies.

Weight

10

Fix Recommendation

For Non-Enterprise Mail Fix Text:

Open the Exchange Management Shell and enter the following command:

Set-RemoteDomain -Identity <'IdentityName'> -AutoForwardEnabled $false

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

For Enterprise Mail Fix Text, enter the following commands:

New-RemoteDomain -Name <NewDomainName> -DomainName <SMTP address space>

Note: NewDomainName must be either a ".mil" or ".gov" domain.

Set-RemoteDomain -Identity <'IdentityName'> -AutoForwardEnabled $true

Check Contents

Non-Enterprise Mail Check Content:

Open the Exchange Management Shell and enter the following command:

Get-RemoteDomain | Select Name, DomainName, Identity, AutoForwardEnabled

If the value of "AutoForwardEnabled" is not set to "False", this is a finding.

Enterprise Mail Check Content:

Open the Exchange Management Shell and enter the following command:

Get-RemoteDomain | Select Name, DomainName, Identity, AutoForwardEnabled

If the value of “AutoForwardEnabled” is “True” and “DomainName” is not set to a “.mil” and/or “.gov” domain(s), this is a finding.

Vulnerability Number

V-221205

Documentable

False

Rule Version

EX16-ED-000040

Severity Override Guidance

Non-Enterprise Mail Check Content:

Open the Exchange Management Shell and enter the following command:

Get-RemoteDomain | Select Name, DomainName, Identity, AutoForwardEnabled

If the value of "AutoForwardEnabled" is not set to "False", this is a finding.

Enterprise Mail Check Content:

Open the Exchange Management Shell and enter the following command:

Get-RemoteDomain | Select Name, DomainName, Identity, AutoForwardEnabled

If the value of “AutoForwardEnabled” is “True” and “DomainName” is not set to a “.mil” and/or “.gov” domain(s), this is a finding.

Check Content Reference

M

Target Key

4079

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