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This article describes how to upgrade the Azure Stack HCI operating system (OS) via PowerShell. Here are the supported upgrade paths:
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This article describes how to upgrade the Azure Stack HCI operating system (OS) via PowerShell. Supported upgrade paths include:
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- OS version 20349.xxxx to 26100.xxxx.
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-From OS version 20349.xxxx to 26100.xxxx.
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- OS version 25398.xxxx to 26100.xxxx.
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-From OS version 25398.xxxx to 26100.xxxx.
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> [!IMPORTANT]
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> This article covers OS upgrades only. Do not proceed if solution upgrade is complete or Azure Local 2311.2 or later is deployed.
@@ -42,16 +42,16 @@ To upgrade the OS on your system, follow these high-level steps:
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- Make sure to shut down virtual machines (VMs). We recommend shutting down VMs before performing the OS upgrade to prevent unexpected outages and damages to databases.
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- Confirm that you have access to the Azure Local **2505** ISO file, which you can download from the [Azure portal](https://portal.azure.com/#view/Microsoft_Azure_ArcCenterUX/ArcCenterMenuBlade/~/hciGetStarted).
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- Consult your hardware OEM to verify driver compatibility. Confirm that all drivers compatible with Windows Server 2025 or Azure Stack HCI OS, 26100.xxxx are installed before the upgrade.
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- Check if the *identity* property is missing or doesn’t contain `type = "SystemAssigned"`. You can verify this in the resource's JSON in the Azure portal or by running the following cmdlet:
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```powershell
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Get-AzResource -Name <cluster_name> -ResourceGroupName <name of the resource group> -ResourceType "Microsoft.AzureStackHCI/clusters" -ExpandProperties
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```
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If the *identity* property is missing or doesn’t contain `type = "SystemAssigned"`, repair the registration using the following cmdlet:
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- Ensure the instance is properly registered. If the *identity* property is missing or doesn’t contain `type = "SystemAssigned"`, run the following command to repair the registration:
You can verify the *identity* property in the Azure portal in resource's JSON or by running the following cmdlet:
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```powershell
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Get-AzResource -Name <cluster_name> -ResourceGroupName <name of the resource group> -ResourceType "Microsoft.AzureStackHCI/clusters" -ExpandProperties
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```
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- (Recommended) Enable [Secure Boot](/windows-hardware/design/device-experiences/oem-secure-boot) on Azure Local machines before you upgrade the OS. To enable Secure Boot, follow these steps:
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