You might have a need to export all the email addresses from a distribution group in Exchange. You can do this easily in Powershell using the command below :-
Get-DistributionGroup "Distribution Group Name" | Get-DistributionGroupMember | select DisplayName,Title,PrimarySMTPAddress
Then if you want a CSV of this
Get-DistributionGroup "Distribution Group Name" | Get-DistributionGroupMember | select DisplayName,Title,PrimarySMTPAddress | Export-CSV c:\temp\filename.csv