I have a simple code where I'm deleting certain users from Distribution Groups. However, whenever it attempts to delete a user, a dialog box appears asking me if I really want to delete the user. It does this for every user I try to delete. Is there a way to make it so that box doesn't appear, and says yes automatically? 

Here's my code:

```
#Accept input parameters
Param(
      [Parameter(Position=0, Mandatory=$true, ValueFromPipeline=$true)]
      [string] $DistributionGroup   
     )

$DL = Get-DistributionGroupMember -Identity $DistributionGroup | select windowsliveid, name | where windowsliveid -like '*c-*'
$DL

$DL | % {
    Remove-DistributionGroupMember -Identity $DistributionGroup -Member $_.name
    }

```