Update 2/8/22: We're actively investigating some problems introduced in Windows Defender Antimalware version 4.18.2201+ where Managed Antivirus is not working as expected.
Huntress Managed AV is only compatible with Microsoft Defender and no other antivirus. By default, Microsoft Defender Antivirus is enabled for all Windows machines that support Microsoft Defender Antivirus.
Using another AV? The antivirus that's registered in Windows Security Center will appear in your Huntress portal on the Managed AV Dashboard for visibility purposes.