Hi,
The answer is no, only one DPM server can back up a Hyper-V cluster at the time, you can however back up the DPM server that is backing up the Hyper-V cluster by another DPM server.
To know which DPM server is backing up a specific server/cluster you can run the following PowerShell script on the DPM server.
Get-DPMProductionServer | Where-Object {$_.ServerName -Eq "Your Hyper-V server" } | select DPMServerName
Best regards,
Leon
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