When users are using shared mailboxes and send email messages out of this Mailbox, you want these messages to be stored in the shared Mailbox. This was already possible in Exchange 2010, but only starting in CU9 this is possible in Exchange 2013 as well.
It is a setting on the shared Mailbox and has to be set using the Exchange Management Shell and works for shared Mailboxes where both the Sent As permissions and Sent on Behalf of permissions are granted.
For shared Mailboxes with the Sent As permissions use the following command:
Set-Mailbox <mailbox> -MessageCopyForSentAsEnabled $True
For shared Mailboxes with the Sent On Behalf of permissions use the following command:
Set-Mailbox <mailbox> -MessageCopyForSendOnBehalfEnabled $True
When testing with Outlook (2013 in this case) and a shared Mailbox where Full Access and Sent As permissions are granted the email message that was sent is stored in the shared Mailbox.
A couple of remarks:
- The email message is stored in the shared Mailbox, but a copy is stored in the user’s Mailbox as well.
- This feature was already available in Office 365 (and can be set using Remote PowerShell).
- If the –MessageCopyForSentAsEnabled and the –MessageCopyForSendOnBehalfEnabled are not available you should run the Setup.exe /PrepareAD /IAcceptExchangeServerLicenseTerms in your environment to make the appropriate changes in the AD’s Configuration partition.