将新计算机添加到域脚本（错误）

Question

我在执行此脚本时遇到问题导致我不理解的错误，脚本运行完美，总是。

如果有人知道这个错误可能是什么原因，那将非常有帮助。

这是剧本：

Param(
    [Parameter(Mandatory=$true)]
    $domain = "lon.lab"
)
$name = Read-Host "Enter your computer name"
$username = "$domain\administrator"
$password = Read-Host -Prompt "Enter Password for $username" -AsSecureString
$cred = New-Object System.Management.Automation.PSCredential ($username, $password)

Add-Computer -DomainName $domain -Credential $cred -NewName $name

这是我得到的错误：

Add-Computer : Computer 'WIN-5V8QHNCLO9U' failed to join domain 'lon.lab' from
its current workgroup 'WORKGROUP' with following error message: Cannot complete
this function.
At C:\Users\Administrator\Desktop\NewPcToDomain.ps1:10 char:1
+ Add-Computer -DomainName $domain -Credential $cred
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (WIN-5V8QHNCLO9U:String) [Add-Computer], InvalidOperationException
    + FullyQualifiedErrorId : FailToJoinDomainFromWorkgroup,Microsoft.PowerShell.Commands.AddComputerCommand

修改：我添加了-Verbose参数，如下所示：

Add-Computer -DomainName $domain -Credential $cred -NewName $name -Verbose

我只是不知道这是如何或为何有效。