Exchange Online - Add contact to distro list via CSV file

#Admin Check
param([switch]$Elevated)
function Test-Admin {
    $currentUser = New-Object Security.Principal.WindowsPrincipal $([Security.Principal.WindowsIdentity]::GetCurrent())
    $currentUser.IsInRole([Security.Principal.WindowsBuiltinRole]::Administrator)
}

if ((Test-Admin) -eq $false)  {
    if ($elevated) {
        # tried to elevate, did not work, aborting
    } else {
        Start-Process powershell.exe -Verb RunAs -ArgumentList ('-noprofile -noexit -file "{0}" -elevated' -f ($myinvocation.MyCommand.Definition))
    }
    exit
}


'Running with full privileges'

#Get Admin Credentials
Write-Host "Please use your full email address as your username"
$UserCredential = Get-Credential

#Authenticate with Office
$Session = New-PSSession -ConfigurationName Microsoft.Exchange -ConnectionUri https://outlook.office365.com/powershell-liveid/ -Credential $UserCredential -Authentication Basic -AllowRedirection

#Connect to Exchange
Import-PSSession $Session -DisableNameChecking

#Get CSV path to import
Write-host "Please Enter the full file path to the csv file"
$path = Read-Host "Full File Path to CSV"
Write-Host "Path is set to " $path

#CSV Format Example
#Members,Identity
#bob@contoso.com,Distribution Group 1
#sally@contoso.com,Distribution Group 2

#Set CSV Headers
$member = "Members"
$distname = "Identity"

#Do WhatIf  First so I can grab and easy to read log
Import-csv -Path $path | ForEach-Object { Add-DistributionGroupMember -Identity "$($_.$distname)" -Member "$($_.$member)" -Confirm:$false -WhatIf }

Import-csv -Path $path | ForEach-Object { Add-DistributionGroupMember -Identity "$($_.$distname)" -Member "$($_.$member)" -Confirm:$false }