Added CertificateThumbprint variable to check & use a cert

Author: PaoloFrigo

Blog/PowerShell/Install-WAC.ps1

@@ -9,26 +9,34 @@
 $WAC_Online = "http://aka.ms/WACDownload"
 $WAC_Installer = "C:\windows\Temp\wac.msi"
 $Port = 443
-
+ 
+# Leave it blank if you want to generate a Self-Signed Certificate.
+$CertificateThumbprint = "" 
 $IsAdminCenterInstalled = [bool] (Get-WmiObject -class win32_product  | Where-Object {$_.Name -eq "Windows Admin Center"})
 
 If ($IsAdminCenterInstalled){
-    $ReInstall = Read-Host "Admin Center is already installed do you want to re-install or upgrade it? [Y/N]"
+    $ReInstall = Read-Host "Admin Center is already installed. Do you want to re-install/upgrade it? [Y/N]"
     If ( ("N","n") -contains $ReInstall){
-        Write-Warning "Windows Admin Center is already installed and no further action is required."   
+        Write-Warning "Ok, No further action is required."  
         Exit 0
     }
 }
-
 Invoke-WebRequest -Uri $WAC_Online -OutFile $WAC_Installer
-msiexec /i $WAC_Installer /qn SME_PORT=$Port SSL_CERTIFICATE_OPTION=generate
+#if CertificateThumbprint is defined and installed on the system will be used during the installation 
+if ([bool](get-childitem cert: -recurse | where-object {$_.thumbprint -eq $CertificateThumbprint})){
+    msiexec /i $WAC_Installer /qn SME_PORT=$Port  SME_THUMBPRINT=$CertificateThumbprint SSL_CERTIFICATE_OPTION=installed
+}
+else{
+    msiexec /i $WAC_Installer /qn SME_PORT=$Port SSL_CERTIFICATE_OPTION=generate
+} 
 
 #Post Installation Checks
 do {
     if ((Get-Service ServerManagementGateway).status -ne "Running"){
-        Write-Output "Starting Windows Admin Center Service"
+        Write-Output "Starting Windows Admin Center (ServerManagementGateway) Service"
         Start-Service ServerManagementGateway
     }
     Start-sleep -Seconds 5
 } until ((Test-NetConnection -ComputerName "localhost" -port $Port).TcpTestSucceeded)
+
 Write-Output "Installation completed and Windows Admin Center is running as expected."