How to use PowerCLI Backup Esxi host on windows 10

 Open Windows PowerShell with Administrator privilege

Step1: run the command: Install-Module -Name VMware.PowerCLI

Step2: Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser

Step 3: Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -Confirm:$false

Step 4: Connect-VIServer x.x.x.x -user root -password your_password

• x.x.x.x : IP of esxi host
• your_password: root's password

Step 5: Get-VMHostFirmware -VMHost x.x.x.x -BackupConfiguration -DestinationPath C:\

Final, you can check destination path to verify.

Reference: https://kb.vmware.com/s/article/2042141#In_vSphere_PowerCLI