diff --git a/Renew-WAPApplications.ps1 b/Renew-WAPApplications.ps1
new file mode 100644
index 0000000..dcdc9ca
--- /dev/null
+++ b/Renew-WAPApplications.ps1
@@ -0,0 +1,19 @@
+# Created by Peter Wickenberg
+# Date 2022-08-01
+# Version 1.0
+
+# Store {CertCommonName} as fqdn variable
+$fqdn = $args[0]
+write-host CertCommonName is $fqdn
+# Get WAP Application and store as variable
+$app = Get-WebApplicationProxyApplication | Where-Object {$_.ExternalUrl -Match "https://" + "$fqdn"}
+write-host WAP Application is $app.Name and it has ID $app.ID
+
+# Set Let's encrypt certificate for WAP Application
+write-host Changing to the latest certificate
+Set-WebApplicationProxyApplication `
+             -ID $app.ID `
+             -BackendServerUrl "$($app.backendserverurl)"`
+             -ExternalCertificateThumbprint $((get-childitem Cert:\LocalMachine\My\ | `select subject,thumbprint,@{ Label = 'IssuedBy' ;Expression = { $_.GetNameInfo( 'SimpleName', $true ) } } | ? {($_.IssuedBy -like "R3*") -and ($_.Subject -like "CN=$fqdn")} | select -First 1).Thumbprint)`
+             -ExternalUrl "$($app.externalURL)"`
+             -Name "$($app.name.substring(0,1).toupper()+$app.name.substring(1).tolower())"
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