ESXiBackup.ps1

# Change these variables to suit your environment
$BackupPath = "d:\Backups\ESXi\"
$ArchivePath = "d:\Backups\ESXi\Archive\"
$vCenterServer = "myvcentreserver.mynetwork.com"

#Zip up existing backup files and Manifest into the Archive Directory
Compress-Archive -Path ($BackupPath + 'configBundle*.tgz'), ($BackupPath + 'Manifest*.txt') -DestinationPath ($ArchivePath + 'ESXiBackup' + (Get-Date -Format yyyyMMdd) + '_'  + (Get-Date -Format HHmm) + '.zip')
Remove-Item ($BackupPath + '*.tgz')
Remove-Item ($BackupPath + 'Manifest*.txt')

# Set powershell to ignore certificate errors, you can comment this out if you are using trusted certs in your environment
Set-PowerCLIConfiguration -InvalidCertificateAction Ignore -Confirm:$false

#Connect to the vCenter Server. You can also connect directly to a single ESXi host
Connect-VIServer -Server $vCenterServer

#Enumerate all of the ESXi hosts and backup the configs to the Backup Directory
Get-VMHost | Get-VMHostFirmware -BackupConfiguration -DestinationPath $BackupPath

#Enumerate all of the ESXi hosts and record the Name, Version and Build in the Manifest file
Get-VMHost | Select Name,Version,Build | Out-File ($BackupPath + 'Manifest'  + '_' + (Get-Date -Format yyyyMMdd) + '_'  + (Get-Date -Format HHmm) + '.txt')

#Disconnect from the vCenter Server
disconnect-viserver -confirm:$false