[SOLVED] Automate "Send me a copy of email I send to a group" via PowerShell

Automate "Send me a copy of email I send to a group" via PowerShell

Referenced MS Article: https://support.microsoft.com/en-us/office/i-m-not-receiving-a-copy-of-messages-i-send-to-a-group-in-my-inbox-07567cda-f5ce-4e52-b278-4c63dfdd6617

I am looking for any possibilities to globally update the setting found in the referenced link above.

I've looked through every admin portal and potential PS references with no luck.

Solution

I found this is a mailbox message configuration item. I'm using the ExchangeOnlineManagement module here, but it should be the same for other versions:

Connect-ExchangeOnline

# To see the current setting:
Get-Mailbox user@domain.com | 
  Get-MailboxMessageConfiguration | 
  Select EchoGroupMessageBackToSubscribedSender
# True|False

# To set for multiple users, get the list of mailbox objects
$mailboxes = Get-Mailbox  ## Filter as needed, and check your -ResultSize too
# The Set command will take the whole list as input
$mailboxes | Where { -Not EchoGroupMessageBackToSubscribedSender } |
  Set-MailboxMessageConfiguration -EchoGroupMessageBackToSubscribedSender $true