Team: Huntress EDR
Product: Managed Defender Antivirus
Environment: Managed AV (MAV)
Summary: Microsoft Defender checks for hourly updates, but is always up to date if the host machine is up to date.
Managed AV - Can I force an update? How do I know if my Microsoft Defender is up-to-date?
These are done through Windows Update and Defender itself checks for updates, so if your machine is up-to-date, Microsoft Defender is. Microsoft Defender also checks for updates every hour.