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

The Exchange Receive Connector Maximum Hop Count must be 60.

DISA Rule

SV-259678r961155_rule

Vulnerability Number

V-259678

Group Title

SRG-APP-000247

Rule Version

EX19-MB-000125

Severity

CAT III

CCI(s)

Weight

10

Fix Recommendation

Update the EDSP to specify the "MaxHopCount" value or verify that this information is documented by the organization.

Open the Exchange Management Shell and enter the following command:

Set-ReceiveConnector -MaxHopCount 60

or

Enter the value as identified by the EDSP that has obtained a signoff with risk acceptance.

Repeat the procedure for each Receive connector.

Check Contents

Review the Email Domain Security Plan (EDSP) or document that contains this information.

Determine the Max Hop Count value for Receive connectors.

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select-Object -Property Name, MaxHopCount

For each Receive connector, if the value of "MaxHopCount" is not set to "60", this is a finding.

or

If the value of "MaxHopCount" is set to a value other than "60" and has signoff and risk acceptance in the EDSP, this is not a finding.

Vulnerability Number

V-259678

Documentable

False

Rule Version

EX19-MB-000125

Severity Override Guidance

Review the Email Domain Security Plan (EDSP) or document that contains this information.

Determine the Max Hop Count value for Receive connectors.

Open the Exchange Management Shell and enter the following command:

Get-ReceiveConnector | Select-Object -Property Name, MaxHopCount

For each Receive connector, if the value of "MaxHopCount" is not set to "60", this is a finding.

or

If the value of "MaxHopCount" is set to a value other than "60" and has signoff and risk acceptance in the EDSP, this is not a finding.

Check Content Reference

M

Target Key

5580