Powershell script to compare group membership for various users listed in txt file.

$Result= @()
$Users = Import-Csv C:\Filename.csv

Foreach ($User in $Users){

$Mailbox = Get-Mailbox -Identity $User
$DL      = Get-DistributionGroup -ResultSize Unlimited | where { (Get-DistributionGroupMember $_ | foreach {$_.PrimarySMTPAddress}) -contains $User.PrimarySMTPAddress}

$Mbx = New-Object System.Object

$Mbx | Add-Member -MemberType NoteProperty -Name Displayname -Value $Mailbox.DisplayName
$Mbx | Add-Member -MemberType NoteProperty -Name DistributionName -Value $DL.Name

$Result +=$Mbx

}

$Result

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