How to do it...

The steps for the recipe are as follows: 

1. Locate the products you want to download to your WSUS server using Get-WsusProduct to search the product titles:

      Get-WsusProduct -TitleIncludes 'Server 2016'
      Get-WsusProduct -TitleIncludes 'Windows 10'

1. Build a list of software product titles you wish to include:

      $ChosenProducts = @('Windows Server 2016',
                     'Microsoft SQL Server 2016',
                     'Windows 10' )

1. Assign the desired products to include in Windows Update:

      Get-WsusProduct | 
      Where-Object {$PSItem.Product.Title -in $ChosenProducts} |
        Set-WsusProduct

1. Updates are classified into distinct categories; a view which classifications of updates are available:

      Get-WsusClassification

1. Build a list of desired update classifications to make available on your WSUS server and view the list:

      $ChosenClassifications = @('Critical Updates',
                            'Definition Updates',
                            'Security Updates',
                            'Service Packs',
                            'Update Rollups',
                            'Updates')
      $ChosenClassifications

1. Set our list of desired update classifications in WSUS:

      Get-WsusClassification | 
      Where-Object {$PSItem.Classification.Title -in 
      $ChosenClassifications} |Set-WsusClassification

1. Create a variable for the Subscription object, start synchronizing Windows Updates, and watch the progress in a loop:

      $WSUSServer = Get-WsusServer
      $WSUSSubscription = $WSUSServer.GetSubscription()
      #Start synchronizing available 
      updates$WSUSSubscription.StartSynchronization()
      $IntervalSeconds = 1
      #Wait for synchronizing to start
      Do {
          Write-Output $WSUSSubscription.GetSynchronizationProgress()
          Start-Sleep -Seconds $IntervalSeconds
         }
     While ($WSUSSubscription.GetSynchronizationStatus() -eq `
     'NotProcessing')
     #wait for all phases of process to end
     Do {
         Write-Output $WSUSSubscription.GetSynchronizationProgress()
         Start-Sleep -Seconds $IntervalSeconds 
        }
     Until ($WSUSSubscription.GetSynchronizationStatus() -eq ` 
    'NotProcessing')

1. Synchronization takes a few moments to start with, and then takes a long time to complete, depending on the number of products chosen. Wait for the process to start in a do-while loop, then wait for the process to complete in a do-until loop:

      $WSUSSubscription.StartSynchronization()
       $IntervalSeconds = 1
      #Wait for synchronizing to start
      Do {
        Write-Output $WSUSSubscription.GetSynchronizationProgress()
        Start-Sleep -Seconds $IntervalSeconds
         }
      While ($WSUSSubscription.GetSynchronizationStatus()
      -eq ` 'NotProcessing')
      #Wait for all phases of process to end
      Do {
        Write-Output $WSUSSubscription.GetSynchronizationProgress()
        Start-Sleep -Seconds $IntervalSeconds
         }
        Until ($WSUSSubscription.GetSynchronizationStatus() 
        -eq ` 'NotProcessing')

1. When the final loop is complete, check the results of the synchronization:

      $WSUSSubscription.GetLastSynchronizationInfo()

1. Configure automatic synchronization to run once per day:

      $WSUSSubscription = $WSUSServer.GetSubscription()
       $WSUSSubscription.SynchronizeAutomatically = $true
       $WSUSSubscription.NumberOfSynchronizationsPerDay = 1
       $WSUSSubscription.Save()