Get certificate used in web request via PowerShell

Get information about the SSL certificate used when accessing example.com/subfolder:

$TheResponse = Invoke-WebRequest https://www.example.com/subfolder/ -UseBasicParsing -TimeoutSec 3 -ErrorAction Stop;$servicePoint = [System.Net.ServicePointManager]::FindServicePoint('https://example.com');$servicePoint.Certificate | Format-Table -Wrap -Autosize;$servicePoint.Certificate.GetCertHashString()

Then to display the certificate hash:

$servicePoint.Certificate.GetCertHashString()

Display the certificate expiration date:

$servicePoint.Certificate.GetExpirationDateString()