DLs and Nested DLs

Question

Hi All

i have a DL in exchange online lets say dl1@Company portal .com and the members of this DL are users as well as another DLs. in this way i have many nested DLs.
how can i pull the users and all nested DLs which are in dl1@Company portal .com to a csv file. experts guide me. can office365 unified group be a member of a DL.

Answer 1

Hi @Roger Roger

Did you mean Microsoft 365 group when you say office365 unified group?
If yes, Microsoft 365 Groups don't support nesting with other Microsoft 365 Groups or with distribution or security groups.

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To get the members in DL and nested DLs, would the following script work for you:

# Exporting DL Objects  
Get-DistributionGroupMember -Identity  DL1 | where {$_.RecipientType -eq 'UserMailbox'} |Select-Object name, WindowsLiveID |  Export-Csv "C:\scripts\mailbox_in_DG.csv"  

#Export Only DL Names from the Parent Group  
Get-DistributionGroupMember -Identity  DL1 | where {$_.RecipientType -ne 'UserMailbox'} | Select-Object name | Export-Csv  "C:\scripts\nestedDG.csv"  
  
# Exporting Nested DL Objects With individual File   
  
Import-Csv  "C:\scripts\nestedDG.csv" |  
  
foreach{  
  
Get-DistributionGroupMember -Identity   $_.Name  | Select-Object name, WindowsLiveID | Export-Csv -Path  C:\scripts\"$($_.Name)".csv -NoTypeInformation  
  
}  

In mailbox_in_DG.csv you would see normal user mailboxes in this DL.
In nestedDG.csv you would see names of nested DLs in this DL.
It would also output the membership of the nested DLs in the csv files which are named in the format <nested DL name>.csv.

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