Check for expiring certificates

Ever get burned by an expired certificate? Here’s a Powershell script to checks certs on a windows box.

Clear-Host
$threshold = 365 #Number of days to look for expiring certificates
$deadline = (Get-Date).AddDays($threshold) #Set deadline date
Invoke-Command -ComputerName server01 { Dir Cert:\LocalMachine\My } | foreach {
If ($_.NotAfter -le $deadline) { $_ | Select PSComputerName, 
Subject, NotAfter, @{Label="Expires In (Days)";Expression={
($_.NotAfter - (Get-Date)).Days}} | ft }}