Merge pull request #1236 from rvdwegen/patch-13

Add app reg certificate expiry alert

Author: KelvinTegelaar

Modules/CIPPCore/Public/Alerts/Get-CIPPAlertAppCertificateExpiry.ps1

@@ -0,0 +1,33 @@
+function Get-CIPPAlertAppCertificateExpiry {
+    <#
+    .FUNCTIONALITY
+        Entrypoint
+    #>
+    [CmdletBinding()]
+    Param (
+        [Parameter(Mandatory = $false)]
+        [Alias('input')]
+        $InputValue,
+        $TenantFilter
+    )
+
+    try {
+        Write-Host "Checking app expire for $($TenantFilter)"
+        $appList = New-GraphGetRequest -uri "https://graph.microsoft.com/beta/applications?`$select=appId,displayName,keyCredentials" -tenantid $TenantFilter
+    } catch {
+        return
+    }
+
+    $AlertData = foreach ($App in $applist) {
+        Write-Host "checking $($App.displayName)"
+        if ($App.keyCredentials) {
+            foreach ($Credential in $App.keyCredentials) {
+                if ($Credential.endDateTime -lt (Get-Date).AddDays(30) -and $Credential.endDateTime -gt (Get-Date).AddDays(-7)) {
+                    Write-Host ("Application '{0}' has certificates expiring on {1}" -f $App.displayName, $Credential.endDateTime)
+                    @{ DisplayName = $App.displayName; Expires = $Credential.endDateTime }
+                }
+            }
+        }
+    }
+    Write-AlertTrace -cmdletName $MyInvocation.MyCommand -tenantFilter $TenantFilter -data $AlertData
+}