Powershell script to list users not on a distribution list

I have an Exchange 2007 server and am needing a powershell script to look at a distribution list with nested distribution lists inside of it and then export a csv of all the mailboxes not in this distribution list.

The DL looks similar to this:
  dept 1
    dept1 directors office
    dept1 people
  dept 2
    dept2 directors office
    dept 2 people
Mike WalkerAsked:
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Shaun VermaakTechnical SpecialistCommented:
Please test
$groupName = "Some Group 1";
$allEmailAddresses = Get-Recipient | Select Name -ExpandProperty EmailAddresses | Select Name,  SmtpAddress;
$membersOfGroup = get-adgroupmember $groupName -recursive | get-aduser -properties mail | select-object mail;
$allEmailAddresses| Where {$membersOfGroup -notcontains $_.mail};

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Mike WalkerAuthor Commented:
Sadly Get-Recipient is not a cmdlet in Exchange 2007
Shaun VermaakTechnical SpecialistCommented:
This person is using it in Exchange 2007. Do you have SP3 CU15+ installed?
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Mike WalkerAuthor Commented:
I'm running Exchange 2007 SP3 UR17
Shaun VermaakTechnical SpecialistCommented:
Mike WalkerAuthor Commented:
I guess by default I was running it in powershell without the Exchange snapin. When I threw in:

"add-pssnapin Microsoft.Exchange.Management.PowerShell.Admin"

Everything worked.
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