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:
entirecompanydl
dept 1
dept1 directors office
dept1 people
dept 2
dept2 directors office
dept 2 people

Mike WalkerAsked: 2017-03-22

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LVL 46

Shaun VermaakTechnical Specialist/DeveloperCommented: 2017-03-22

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: 2017-03-23

Sadly Get-Recipient is not a cmdlet in Exchange 2007

LVL 46

Shaun VermaakTechnical Specialist/DeveloperCommented: 2017-03-23

This person is using it in Exchange 2007. Do you have SP3 CU15+ installed?

Mike WalkerAuthor Commented: 2017-03-23

I'm running Exchange 2007 SP3 UR17

LVL 46

Shaun VermaakTechnical Specialist/DeveloperCommented: 2017-03-23

Sorry, meant to post this link
https://www.experts-exchange.com/questions/28164072/Exchange-2007-Get-Recipient-does-not-return-all-results.html

Mike WalkerAuthor Commented: 2017-03-23

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.