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Agent is managed by another Veeam server

KB ID: 4548
Product: Veeam Backup & Replication | 12 | 12.1 | 12.2 | 12.3
Veeam Agent for Microsoft Windows | 5.0 | 6.0 | 6.1 | 6.2 | 6.3
Veeam Agent for Linux | 5.0 | 6.0 | 6.1 | 6.2 | 6.3
Veeam Agent for Mac | 2.0 | 2.1 | 2.2 | 2.3
Published: 2024-02-14
Last Modified: 2024-03-27
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Challenge

During the Rescan of a Protection Group, a machine displays the warning:

Agent is managed by another Veeam server (<other_Veeam_server>)
Warning

Cause

This occurs when configuration settings are present on the machine indicating that the Veeam Agent deployment on that machine is managed by a different Veeam Backup & Replication server.

Solution

Backup Server In Warning is Intended Owner

If the Veeam Backup Server listed in the warning is valid and is intended to manage the machine, remove the machine from the protection group on the Veeam Backup Server where the warning occurred.

Veeam Agent Management Migration

If the intent is to migrate the machine's management from the other Veeam Backup Server to this new Veeam Backup Server, first remove it from all jobs and protection groups on the other machine.

More Information

Forcefully Disassociate Veeam Agent Deployment

Perform Only if Managing Veeam Backup Server is Decommisioned

Typically, once a machine has been removed from all jobs and protection groups on a Veeam Backup Server, records tying that Veeam Agent deployment to that Veeam Backup Server should be removed.

However, if the Veeam Backup Server managing the Veeam Agent deployment is no longer available or has been decommissioned, perform the following procedure to reset the Veeam Agent configuration, forcing it into standalone operation mode.

Note: These steps should not be performed if the managing Veeam Backup Server is still active and accessible.

Documentation

Standalone Reset Commands

These commands are fully documented in the links above.

For Veeam Agent for Microsoft Windows, open an Administrative PowerShell prompt and execute:

& 'C:\Program Files\Veeam\Endpoint Backup\Veeam.Agent.Configurator.exe' -removeOwner /i /force

If the Veeam Agent for Microsoft Windows deployment was operating in Managed by Server mode, the above command will exit with code 3:

Unable to set agent to self-managed mode because this backup agent is already managed by the backup server.

Use the Manual Standalone Reset Script below to forcibly untether the Veeam Agent for Microsoft Windows deployment from Veeam Backup & Replication.

Manual Standalone Reset Script

Note: When Veeam Agent for Microsoft Windows is deployed in Managed by Server mode, no shortcuts for the application are created in the start menu. The commands below to disassociate the deployment will not create those shortcuts. This procedure is only intended for migrating a Veeam Agent for Microsoft Windows deployment from being managed by a dead Veeam Backup Server to a new one. To achieve actual standalone operation, uninstall Veeam Agent for Microsoft Windows and reinstall using the standalone package.

Open an Administrative PowerShell console and run the following commands:

This process mimics the reset procedure the Veeam Agent Configurator would perform.

Remove-Item -Path $(Get-ChildItem Cert:\LocalMachine\My | Where-Object { $_.FriendlyName -eq "Veeam Agent Certificate" }).PSPath -Confirm:$false
Set-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam Agent for Microsoft Windows\ManagedMode" -Name "License" -Value "" -ErrorAction Ignore
Set-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam EndPoint Backup" -Name "DisableNotifications" -Value 0 -ErrorAction Ignore
Remove-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam EndPoint Backup" -name "SerializedConnectionParams" -ErrorAction Ignore
Remove-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam EndPoint Backup" -name "ManagedModeInstallation" -ErrorAction Ignore
Remove-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam EndPoint Backup" -name "VbrServerName" -ErrorAction Ignore
Remove-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam EndPoint Backup" -name "CatchAllOwnership" -ErrorAction Ignore
Remove-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam EndPoint Backup" -name "VBRServerId" -ErrorAction Ignore
Remove-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam EndPoint Backup" -name "JobSettings" -ErrorAction Ignore
Remove-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam EndPoint Backup" -name "BackupServerIPAddress" -ErrorAction Ignore
Remove-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam EndPoint Backup" -name "RMMProviderMode" -ErrorAction Ignore
Remove-ItemProperty -Path "HKLM:\SOFTWARE\Veeam\Veeam EndPoint Backup" -name "ReadonlyMode" -ErrorAction Ignore
Restart-Service "Veeam Agent for Microsoft Windows"
For Veeam Agent for Linux and Veeam Agent for Mac: 
sudo veeamconfig mode reset --force
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