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

Exchange must use encryption for RPC client access.

DISA Rule

SV-259645r960759_rule

Vulnerability Number

V-259645

Group Title

SRG-APP-000014

Rule Version

EX19-MB-000006

Severity

CAT II

CCI(s)

• CCI-000068 - Implement cryptographic mechanisms to protect the confidentiality of remote access sessions.

Weight

10

Fix Recommendation

Open the Exchange Management Shell and enter the following command:

Set-RpcClientAccess -Server <ServerName> -EncryptionRequired $true

Check Contents

Open the Exchange Management Shell and enter the following command:

Get-RpcClientAccess | Select-Object -Property Server, Name, EncryptionRequired

If the value of "EncryptionRequired" is not set to "True", this is a finding.

Note: This is configured as "True" by default.

Vulnerability Number

V-259645

Documentable

False

Rule Version

EX19-MB-000006

Severity Override Guidance

Open the Exchange Management Shell and enter the following command:

Get-RpcClientAccess | Select-Object -Property Server, Name, EncryptionRequired

If the value of "EncryptionRequired" is not set to "True", this is a finding.

Note: This is configured as "True" by default.

Check Content Reference

M

Target Key

5580