Get Distribution Group Owner lists and email
User below PowerShell one liner we can list group owners and their email ID in Microsoft 365.
To get for one group.
Get-DistributionGroup TestGroup@Domain.com | select PrimarySmtpAddress, @{n= "ManagedBy"; e={$_.ManagedBy | foreach {(Get-Mailbox $_).PrimarySMTPAddress}}}
To get for all groups
Get-DistributionGroup | select PrimarySmtpAddress, @{n= "ManagedBy"; e={$_.ManagedBy | foreach {(Get-Mailbox $_).PrimarySMTPAddress}}}
We can also filter groups and get the list. Below command will list all the groups starting with DL-IT
Get-DistributionGroup DL-IT* | select PrimarySmtpAddress, @{n= "ManagedBy"; e={$_.ManagedBy | foreach {(Get-Mailbox $_).PrimarySMTPAddress}}}
TechCognizance 
Thank you very much for the script.
in the output file owner email address are separated by space, how to separate owner email address by ,
thank you, just used this today!
Can yo point me at a doc to learn more about the “@{n= “ManagedBy”; e={$_.ManagedBy ” syntax?