Challenge
When attempting to add an Azure Stack HCI OS cluster or node to Veeam Backup & Replication, the following error occurs:
Your organization used Device Guard to block this app. Contact your support person for more info.
Failed to start service 'VeeamDeploySvc'. Host: 'x.x.x.x'.
Failed to start deployment service on the target host
Cause
By default, Azure Stack HCI OS 23H2 and newer has Windows Defender Application Control (WDAC) enabled and running in the enforcement mode. WDAC is a software-based security layer that reduces the attack surface by enforcing an explicit list of software that is allowed to run. WDAC limits the applications and the code that can run on the core platform.
To allow third-party non-Microsoft signed software to run on Azure Stack HCI nodes, a WDAC supplemental policy provided by the third-party software vendor must be installed.
Solution
Veeam Backup & Replication WDAC Supplemental Policy Deployment
Download the Policy XML Package from the Download Information section below.
Copy the policy XML file to a location on the CSV (Cluster Shared Volume) shared by the nodes.
Deploy the policy using Add-ASWDACSupplementalPolicy cmdlet.This can also be done using the latest version of Windows Admin Center.
Download Information
Download Policy XML
Filename: KB4456-VBR-AZHCI-supplemental-policy-1.0.0.4.zip
Updated: 2025-03-27
MD5: C745A895B1C706AF5D1454DFD37278E8
SHA1: 3B01D9569A35DC93EFEC771E43936930DA743B99
More Information
Windows Defender Application Control for Azure Stack HCI (preview)
Manage Windows Defender Application Control for Azure Stack HCI, version 23H2
KB4047: Veeam Support for Azure Stack HCI
