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The number of running or configured virtual machines must be within supported limits

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Applies to: Windows Server 2022, Windows Server 2019, Windows Server 2016

For more information about best practices and scans, see Run Best Practices Analyzer Scans and Manage Scan Results.

Property Details
Operating System Windows Server 2016
Product/Feature Hyper-V
Severity Error
Category Configuration

In the following sections, italics indicates text that appears in the Best Practices Analyzer tool for this issue.

Issue

More virtual machines are running or configured than are supported.

Impact

Microsoft does not support the current number of virtual machines running or configured on this server.

Resolution

Move one or more virtual machines to another server.

For details about maximum supported configurations for Hyper-V, such as the number of running virtual machines, see Plan for Hyper-V scalability in Windows Server 2016.

To move a virtual machine to another server, you can:

To export a virtual machine

Important

If the Hyper-V host you're exporting from belongs to a domain and you want to store the exported files on a remote location, the Hyper-V host must be configured for constrained delegation. A remote location might be a shared network folder or a folder on the host you're importing to. Constrained delegation lets the computer account of the Hyper-V host provide delegated credentials for the Common Internet File System (CIFS) service to the remote computer. For instructions on configuring constrained delegation, see the section following the export and import instructions, below.

  1. Open Hyper-V Manager. Click Start, point to Administrative Tools, and then click Hyper-V Manager.

  2. In the results pane, under Virtual Machines, right-click a virtual machine and then click Export.

  3. In the Export a Virtual Machine dialog box, type or browse to a location that has enough free space to store all of the virtual machine resources. When you export a virtual machine, all virtual hard disks (.vhd files or .vhdx files), checkpoints (.avhd files), and saved state files associated with the virtual machine are copied to the specified folder.

  4. Click Export.

After exporting the virtual machines, import the virtual machines to the other server.

To import a virtual machine to another server

  1. Connect to the server running Hyper-V and open Hyper-V Manager.

  2. In the Action pane, click Import Virtual Machine.

  3. In the Import Virtual Machine dialog box, specify the location where you exported the virtual machine. Unless you want to reimport this virtual machine, leave the import settings as they are.

  4. Click Import.

To configure constrained delegation

Membership in the Domain Administrators group is required to complete this procedure.

  1. On a computer that has the Active Directory Domain Services Tools feature installed, in Administrative Tools, open Active Directory Users and Computers, and then navigate to the computer account for the computer running Hyper-V.

    Note

    If Active Directory Users and Computers is not listed, install the Active Directory Domain Services Tools feature. For instructions, see Installing Remote Server Administration Tools for AD DS (https://go.microsoft.com/fwlink/?LinkId=140463).

  2. Right-click the computer account for the computer running Hyper-V, and then click Properties.

  3. On the Delegation tab, click Select this computer for delegation to specified services only, and then click Use any authentication protocol.

  4. To allow the Hyper-V computer account to present delegated credentials to the remote computer:

    1. Click Add.

    2. In the Add Services dialog box, click Users or Computers, select the remote computer, and then click OK.

    3. In the Available services list, select the cifs protocol (also known as the Server Message Block (SMB) protocol), and then click Add.