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--- powershell_cheat_sheet [2021/02/18 06:54] – [Get Install-Module working behind a webproxy] stephen
+++ powershell_cheat_sheet [2021/04/13 21:53] (current) – external edit 127.0.0.1
@@ Line 59: / Line 59: @@
 </code>
-===== Search installed certs for thumbprint =====
+===== Certificates =====
+Search by thumbprint:
 <code powershell>
@@ Line 69: / Line 71: @@
 <code powershell>
 Get-ChildItem -Path Cert: -Recurse | Where-Object { $_.Thumbprint -and $_.Thumbprint.ToLower().StartsWith('c4') } | Test-Certificate
+</code>
+To check for expired / revoked certs:
+<code powershell>
+$certs = Get-ChildItem -Path Cert:\LocalMachine\My -Recurse
+foreach ($cert in $certs) {
+    Write-Host "$($cert.Thumbprint) $($cert.Subject)"
+    if ($certs.NotAfter -lt (Get-Date)) {
+        Write-Host "    Expired on $($certs.NotAfter)" -ForegroundColor Red
+    }
+    elseif ($cert | Test-Certificate) {
+        Write-Host "    Tested ok." -ForegroundColor Green
+    }
+}
 </code>