PowerShell function to download the Azure Public IP Ranges file and save it locally

Get-AzureIPRangesXMLFile.ps1

Function Get-AzurePublicIPRangesXMLFile
{
<#
    .SYNOPSIS
        This function downloads the Azure IP ranges XML file to the current directory or a specified path.
    .DESCRIPTION
        This function downloads the Azure IP ranges XML file to the current directory or a specified path.
    .PARAMETER AzureIPRangeURL
        An optional parameter that is the URL to the Azure IP range XML file download page.
    .PARAMETER DestinationPath
        The locaiton on the local filesystem where the Azure IP range XML file is to be downloaded.
    .EXAMPLE
        Get-AzurePublicIPRangesXMLFile -DestinationPath C:\AzureIPXMLFiles\
        Get-AzurePublicIPRangesXMLFile -DestinationPath C:\AzureIPXMLFiles\ -AzureIPRangeURL 'https://www.microsoft.com/en-gb/download/confirmation.aspx?id=41653'
    .NOTES
#>
[CmdletBinding()]
Param(
    [Parameter(Mandatory=$false,HelpMessage='Enter the URL for the Azure IP range XML file')]
        [String]$AzureIPRangeURL = 'https://www.microsoft.com/en-gb/download/confirmation.aspx?id=41653',
    [Parameter(Mandatory=$true,HelpMessage='Enter the path where the XML file should be written')]
        [ValidateScript({ Test-Path $_ })]
        [String]$DestinationPath
)
    If( $null -eq $AzureIPRangeURL ) { $AzureIPRangeURL = 'https://www.microsoft.com/en-gb/download/confirmation.aspx?id=41653' }
    $AzureIPRangePage = (Invoke-WebRequest -UseBasicParsing -Uri $AzureIPRangeURL )
    $AzureIPRangeXMLFileURL = (($AzureIPRangePage.Links |  Where-Object { $_.href -like "*PublicIP*xml" }).href)[0]
    Write-Verbose "Azure IP Range XML File URL is $AzureIPRangeXMLFileURL"
    Invoke-WebRequest -UseBasicParsing -Uri $AzureIPRangeXMLFileURL -OutFile "$DestinationPath\AzurePublicIPRanges.xml"

}#EndFunction Get-AzureIPRangesXMLFile