Written on 3. February 2022

Message Copy for send email in shared mailbox

To save a copy of a send email in a shared mailbox just execute the following two powershell commands.

set-mailbox <mailbox name> -MessageCopyForSentAsEnabled $True
set-mailbox <mailbox name> -MessageCopyForSendOnBehalfEnabled $True
https://docs.microsoft.com/en-us/exchange/troubleshoot/user-and-shared-mailboxes/sent-mail-is-not-saved