Get-DistributionGroup

Question

I have dynamic distribution lists in Exchange Online. I have a user and want to find out which dynamic distribution lists this user is a member of. I want to try something like the following, but I’m not sure if it's correct

Get-DynamicDistributionGroup -ResultSize Unlimited | Where-Object { (Get-DistributionGroupMember $_.Identity).PrimarySmtpAddress -eq 'user1@contoso.com' }

Answer 1

Hi @Glenn Maxwell ,

Welcome to the Microsoft Q&A platform!

Based on your description, I understand you want to find out which dynamic distribution lists the user is a member of via PowerShell.

After my test, you could do this with the following script as the screenshot shows.

$userEmail = "user@example.com"
$dynamicDLs = Get-DynamicDistributionGroup

foreach ($dl in $dynamicDLs) {
$filter = $dl.RecipientFilter
$members = Get-Recipient -RecipientPreviewFilter $filter
if ($members.PrimarySmtpAddress -contains $userEmail) {
Write-Output "$($userEmail) is a member of $($dl.Name)" 
} 
   }

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