A PowerShell script for updating the licenses of Sitecore 9.x

update-licenses.ps1

#Requires -RunAsAdministrator
param (
    [Parameter(Mandatory=$true)]
    [string]
    $SitePrefix,
    [Parameter(Mandatory=$false)]
    [string]
    $LicensePath = "$PSScriptRoot/license.xml",
    [switch]
    $WhatIf
)

Import-Module WebAdministration

if (-not $(Test-Path $LicensePath)) {
    Write-Error "The license file does not exist: $LicensePath"
    Exit
}

$sites = Get-ChildItem IIS:\Sites | ? Name -like "*$($SitePrefix)*"
if (-not $sites) {
    Write-Error "No websites found."
    Exit
}

$licenses = $sites | % { $_.PhysicalPath -replace "physicalPath=" } | Get-ChildItem -Filter "license.xml" -Recurse
$licenses | % {
    Copy-Item -Path $_.FullName -Destination "$($_.FullName).old" -Force -WhatIf:$WhatIf
    Copy-Item -Path $LicensePath -Destination $_.FullName -Force -WhatIf:$WhatIf
}

Get-Service -Name "*$($SitePrefix)*" | Restart-Service -WhatIf:$WhatIf