STIGQter: STIG Summary: Microsoft Exchange 2019 Mailbox Server Security Technical Implementation Guide Version: 2 Release: 3 Benchmark Date: 02 Jul 2025:

Exchange external/internet-bound automated response messages must be disabled.

DISA Rule

SV-259688r961161_rule

Vulnerability Number

V-259688

Group Title

SRG-APP-000261

Rule Version

EX19-MB-000136

Severity

CAT II

CCI(s)

• CCI-001308 - Automatically update spam protection mechanisms on an organization-defined frequency.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-RemoteDomain -Identity <'IdentityName'> -AllowedOOFType 'InternalLegacy'

Note: The <IdentityName> and InternalLegacy values must be in quotes.

Check Contents

Open the Exchange Management Shell and enter the following command:

Get-RemoteDomain | Select-Object -Property Name, DomainName, Identity, AllowedOOFType

If the value of "AllowedOOFType" is not set to "InternalLegacy", this is a finding.

Vulnerability Number

V-259688

Documentable

False

Rule Version

EX19-MB-000136

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

Get-RemoteDomain | Select-Object -Property Name, DomainName, Identity, AllowedOOFType

If the value of "AllowedOOFType" is not set to "InternalLegacy", this is a finding.

Check Content Reference

M

Target Key

5580