If you are downloading from the Evaluation Center today, the ISO usually includes the "Update" (KB2919355) integrated.
if ($DriversFolder -and (Test-Path $DriversFolder)) Write-Host "[3/7] Injecting drivers..." -ForegroundColor Yellow dism /Image:$MountDir /Add-Driver /Driver:$DriversFolder /Recurse /ForceUnsigned else Write-Host "[3/7] Skipping driver injection" -ForegroundColor Gray windows server 2012r2 iso
(collect from Microsoft Update Catalog): If you are downloading from the Evaluation Center
: Install Windows ADK with Deployment Tools from Microsoft. windows server 2012r2 iso