使用PowerShell将多个Office365组分配给成员？

Question

我正在尝试通过使用CSV文件中的数据在Office 365中创建多个用户。我的代码如下：

#Enter a path to import the CSV file
$OfficeUsers = Import-Csv C:\Users\***\Desktop\AllUsers.csv

#For each entry (user) in the file path
foreach($User in $OfficeUsers)
    {
    #Assign the following values to the variables
    #User
    $DisplayName = $User.fullname
    $FirstName = $User.firstname
    $LastName = $User.lastname
    $Username = $User.email

    #UGroups
    $Office_Groups = "Egg_Group", "Chicken_Group", "Soup_Group"

    New-MsolUser `
    -DisplayName $DisplayName `
    -FirstName $FirstName `
    -LastName $LastName `
    -UserPrincipalName $Username `

    Add-UnifiedGroupLinks `
    -Identity $Office_Groups `
    -LinkType Members `
    -Links $Username
    }

但是，我遇到以下错误，无法找出原因：

Cannot process argument transformation on parameter 'Identity'. Cannot convert the "System.Collections.ArrayList" value of type "System.Collections.ArrayList" to type "Microsoft.Exchange.Configuration.Tasks.DistributionGroupIdParameter".
+ CategoryInfo          : InvalidData: (:) [Add-DistributionGroupMember], ParameterBindin...mationException
+ FullyQualifiedErrorId : ParameterArgumentTransformationError,Add-DistributionGroupMember
+ PSComputerName        : outlook.office365.com

任何指导将不胜感激。