Microsoft Defender Application Guard
Answer: Microsoft Defender Application Guard is deprecated and is no longer available beginning with Windows 11 version 24H2. Do not design a new browser-isolation deployment around it; evaluate current Microsoft Edge and endpoint-security controls instead.
Administrator playbook
Decide, verify, and document
Use the curated answer as a starting point, then prove the outcome against the target tenant or device.
What it means
- Application Guard was deprecated for Microsoft Edge for Business and is not available in Windows 11 24H2
- Existing documentation may describe earlier supported Windows releases and editions
- A deprecated feature is a migration signal even when an older managed device can still expose it
What to check next
- Confirm the target Windows version before troubleshooting a missing Application Guard feature
- Inventory policies, extensions, and workflows that still depend on the isolated container
- Replace the control with a supported browser, Defender, application-control, or isolation design appropriate to the risk
Verify success
- Confirm the feature is present or enabled on the target edition and build.
- Test the intended workflow with a pilot device and least-privileged user.
- Confirm policy reports success from the actual management authority.
Escalate when
- The documented edition and hardware requirements are met but the feature is absent.
- Policy reports success while the user or device state is incorrect.
- Licensing or OEM terms—not technical prerequisites—control the outcome.
Copyable admin briefAnswer, next checks, source, and review date
Capture edition and build
Get-ComputerInfo | Select-Object WindowsProductName,WindowsVersion,OsBuildNumber,OsArchitectureRead-only. Edition and exact build often control availability.
List optional feature state
Get-WindowsOptionalFeature -Online | Where-Object State -ne "Disabled" | Select-Object FeatureName,StateRead-only. Not every Windows capability is represented as an optional feature.
Evidence to preserve
- Windows edition, version, and build
- Hardware and firmware prerequisites
- Management authority and policy source
- Required user or device experience