Exchange antimalware agent must be enabled and configured.
Overview
| Finding ID | Version | Rule ID | IA Controls | Severity |
| V-259694 | EX19-MB-000146 | SV-259694r1015276_rule | CCI-004964 | medium |
| Description | ||||
| Microsoft Exchange 2019 offers built-in antimalware protection for messages going through the transport pipeline. When enabled, the default settings are configured to automatically update. Exchange's built-in Malware Agent is not designed to address all malicious code protection workloads. This workload is best handled by third-party antivirus and intrusion prevention software. Sites must use an approved DOD scanner. Exchange Malware software has a limited scanning capability and does not scan files that are downloaded, opened, or executed. | ||||
| STIG | Date | |||
| Microsoft Exchange 2019 Mailbox Server Security Technical Implementation Guide | 2025-05-14 | |||
Details
Check Text (C-259694r1015276_chk)
Open the Exchange Management Shell and run the following cmdlets:
Get-TransportAgent "Malware Agent"
If the identity "Malware Agent" is not set to "Enabled", this is a finding.
Fix Text (F-63341r942395_fix)
Open the Exchange Management Shell and run the following command:
& $env:ExchangeInstallPath\Scripts\Enable-AntimalwareScanning.ps1
This will automatically enable the anti-malware agent. After the script completes, run the following cmdlet to complete the process:
Restart-Service MSExchangeTransport
This may take up to 10 minutes to take effect.