Updating IIS SSL Certificate Bindings using PowerShell

I recently had a requirement to use PowerShell to automatically update the SSL Certificate bindings in IIS so I started hunting around for scripts that would help me accomplish this.

Initially, I encountered this script which provided some insight on how to accomplish this:  http://www.iis.net/learn/manage/powershell/powershell-snap-in-configuring-ssl-with-the-iis-powershell-snap-in

Unfortunately, this article was quite old and outdated and relied on a PowerShell Snap-In which I could not easily determine how to load.

Thankfully, I then came across this much, much NEWER article which is much, much more helpful in determining exactly how to accomplish this task: https://blogs.technet.microsoft.com/heyscriptingguy/2015/03/01/weekend-scripter-use-powershell-to-update-ssl-bindings/

I ended up using this slightly modified version of that PowerShell script to achieve my goals:

[CmdletBinding()]
Param (
 [Parameter(Mandatory = $True, HelpMessage = "Please enter the name of the Web Site")]
 [string]$WebsiteName = "Default Web Site",
 [Parameter(Mandatory = $True, HelpMessage = "Please specify the SSL Port Number")]
 [string]$SSLPort = "443",
 [Parameter(Mandatory = $True, HelpMessage = "Please enter the SSL Certificate Common Name such as *.microsoft.com")]
 [string]$SSLCertSubject
)

Import-Module WebAdministration

Import-Module PKI


function Get-CertificateThumbprint
{
 Param ([string]$CertificateSubject)
 
 $CertThumbprint = (Get-ChildItem -Path cert:\LocalMachine\My -Recurse | Where-Object { $_.Subject -like "CN=$CertificateSubject*" } | Select-Object Thumbprint).Thumbprint
 
 return $CertThumbprint
}


$thumbPrint = Get-CertificateThumbprint -CertificateSubject $SSLCertSubject
$IPAddress = "0.0.0.0"

Clear-Host

New-WebBinding -Name $WebsiteName -IPAddress "*" -Port $SSLPort -Protocol "https"

Get-Item -Path "cert:\LocalMachine\My\$thumbPrint" | New-Item -Path "IIS:\SSLBindings\$IPAddress!$SSLPort"