Azure Local issue missing KB

Question

Hello,

I try to install Azure local instance on virtual HyperV Windows Server.
All validation step works be the last one not.

The error message is

Type 'ValidateOSImageRecipe' of Role 'EnvironmentValidator' raised an exception: { "ExceptionType": "json", "ErrorMessage": { "Message": "OSImageRecipe requirements not met. Review output and remediate.", "Results": { "Name": "AzStackHci_OSImageRecipeValidation_LCU", "DisplayName": "Latest Cumulative Update matches recipe.", "Tags": { }, "Title": "Latest Cumulative Update matches recipe.", "Status": 1, "Severity": 2, "Description": "Validating that the LCUs installed on the host match the LCUs defined in the OS image recipe.",

[..]

"Detail": "LCU [microsoft.azurestack.platformupdates] is NOT installed on host [NODE1] as the version defined in the recipe - expected [KB5049620], but got []. Installed Hot Fixes: [KB5054705 KB5055527 KB5054005 KB5055766].; LCU [microsoft.azurestack.platformupdates] is NOT installed on host [NODE1] as the version defined in the recipe - expected [KB5053599], but got []. Installed Hot Fixes: [KB5054705 KB5055527 KB5054005 KB5055766].", "Status": "FAILURE", "TimeStamp": "04/17/2025 17:13:48", "Resource": "OS Image Recipe", "Source": "NODE1" }, "HealthCheckSource":

But I can't install KB5053599 and KB5049620 (manualy with msu) because they are not compatible with the OS version

AzureLocal23H2.25398.469.LCM.10.2503.0.3057.x64.en-us

Answer 1

Hello azureentreprisemusic,

Welcome to the Microsoft Q&A and thank you for posting your questions here.

I understand that the issue is related to missing KB updates on your Azure local instance. The error message indicates that the required LCUs (KB5053599 and KB5049620) are not installed on the host (NODE1), which is causing the validation to fail.

You will need to do the followings:

1. Check if your Hyper-V host OS matches the exact build required by the recipe. For example, ASH 23H2 may require Windows Server 2022 build 20348.1 with KB5053599, not `25398.469
2. The OS image AzureLocal23H2.25398.469 might be misaligned with your deployment target. Download the correct VHD from: https://learn.microsoft.com/en-us/azure-stack/operator/azure-stack-apply-os-update?view=azs-2501#prepare-the-os-image Then, use the Azure Stack Hub Marketplace to download the OS image matching your ASH version such as, 23H2 build 20348.1
3. I will also suggest that if the host OS is newer like build 25398.469, downgrade or reinstall to match the recipe’s baseline OS build.
4. If Strictly Necessary, though is not recommended for production environment: If the recipe is outdated, override validation checks by using PowerShell to skip validation:

        Set-LocalRegistry -Name "BypassRecipeValidation" -Value "True"  
   

5. If you need to contact Microsoft Support, I recommend you share the OS image recipe ID and host logs via Microsoft Support for Azure Stack Hub and/or PCS: Priority Customer Support

I hope this is helpful! Do not hesitate to let me know if you have any other questions or clarifications.

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Answer 2

Hi azureentreprisemusic

Thanks, Sina, for providing your inputs. I am adding some additional inputs:

1. Verify that your Windows Server version is compatible with the required updates (KB5049620 and KB5053599).
2. If your OS version does not support KB5049620 and KB5053599, consider installing KB5055527 or KB5054005, which are already available on your system.
3. Go to the Microsoft Update Catalog and search for updates specific to AzureLocal23H2. Ensure you select LCUs that match your OS version rather than installing incompatible updates.

Additional References:

https://learn.microsoft.com/en-us/azure/azure-local/security-update/security-update?view=azloc-2504&tabs=existing-deployments

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