Check for certificate expiration with PowerShell (on multiple servers)

 

Server

$threshold = 30   #Number of days to look for expiring certificates 
$deadline = (Get-Date).AddDays($threshold)   #Set deadline date 
Dir Cert:\LocalMachine\My | foreach { 
If ($_.NotAfter -le $deadline) { $_ | Select Issuer, Subject, NotAfter, @{Label="Expires In (Days)";Expression={($_.NotAfter - (Get-Date)).Days}} } 
} 

 

Multiple Servers

$threshold = 30   #Number of days to look for expiring certificates 
 
$deadline = (Get-Date).AddDays($threshold)   #Set deadline date 
 
Invoke-Command -ComputerName Srv01, Srv02 { Dir Cert:\LocalMachine\My } | foreach { 
  If ($_.NotAfter -le $deadline) { $_ | Select Issuer, Subject, NotAfter, @{Label="Expires In (Days)";Expression={($_.NotAfter - (Get-Date)).Days}} } 
} 

 

Fuente: https://gallery.technet.microsoft.com/scriptcenter/Check-for-certificate-c94810e1