Check for expiring server certs

Ever get burned by an expired certificate? Here’s a PowerShell script to check certificates on a server.

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 }
}

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