Check cert in 60days warning if did.

 $minimumCertAgeDays = 60
 $timeoutMilliseconds = 10000
 $urls = @(
 "https://google.com"
 )
 [Net.ServicePointManager]::ServerCertificateValidationCallback = {$true}
foreach ($url in $urls)
 {
 $req = [Net.HttpWebRequest]::Create($url)
 $req.Timeout = $timeoutMilliseconds
try {$req.GetResponse() |Out-Null} catch {Write-Host Exception while checking URL $url`: $_ -f Red}
[datetime]$expiration = $req.ServicePoint.Certificate.GetExpirationDateString()
 [int]$certExpiresIn = ($expiration - $(get-date)).Days
 $certName = $req.ServicePoint.Certificate.GetName()
 $certPublicKeyString = $req.ServicePoint.Certificate.GetPublicKeyString()
 $certSerialNumber = $req.ServicePoint.Certificate.GetSerialNumberString()
 $certThumbprint = $req.ServicePoint.Certificate.GetCertHashString()
 $certEffectiveDate = $req.ServicePoint.Certificate.GetEffectiveDateString()
 $certIssuer = $req.ServicePoint.Certificate.GetIssuerName()
if ($certExpiresIn -gt $minimumCertAgeDays){
 $certok = Write-Host Cert for site $url expires in $certExpiresIn days [on $expiration] -f Green}
 else{
 $certnotok = Write-Host Cert for site $url expires in $certExpiresIn days [on $expiration] Threshold is $minimumCertAgeDays days. Check details:`n`nCert name: $certName`nCert public key: $certPublicKeyString`nCert serial number: $certSerialNumber`nCert thumbprint: $certThumbprint`nCert effective date: $certEffectiveDate`nCert issuer: $certIssuer -f Red
 }
 }

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