Edit 6/15/2015: We are starting to make this feature available again in Office 365. Note that the new shared mailbox Sent Items behavior is disabled by default. If you want to enable it for your users, you can do so by using cmdlets mentioned below. Additionally, we are still on track to ship this to our on-premises customers in Exchange 2013 CU9, as mentioned before.Whether a mailbox is used by multiple users as a collaborative tool or a communication gateway to customers, retaining a record of emails sent from a shared mailbox remains an important business requirement. In Exchange 2010, there was a way to configure this behavior, but we did not have this feature starting with Exchange 2013. Our customers have told us that a shared mailbox should keep a copy of emails sent from the mailbox by all members of the mailbox in its own Sent Items folder. We have taken that feedback and decided to make some changes to how sent mails are handled for shared mailboxes. We are excited to announce that once this feature is enabled for you (see below), by default all shared mailboxes will retain a copy of emails sent from the mailbox. You will no longer have to figure out which mailbox member sent an email as the shared mailbox or on behalf of it.
Note: If the user has used the Outlook 2013 feature to change the folder that Sent Items are saved to, the messages will be copied to that folder instead of the user’s Sent Items folder. Users can reconfigure this by clicking the “Save Sent Items To” button on the Email Options tab.Administrators have control over this feature for either mails Sent As or Sent on Behalf of a shared mailbox. The table below summarizes where sent mails reside when members of a shared mailbox send mail from the shared mailbox.
|User Mailbox||Shared Mailbox||Sent Items|
|Exchange 2010||Exchange 2010||Controlled through settings in KB2632409|
|Exchange 2010||Exchange 2013 (any version)||Controlled through settings in KB2632409|
|Exchange 2013 CU9 (or newer) Office 365||Exchange 2010||The sent mail will be delivered to both the Inbox of the shared mailbox as an email attachment* and to the user mailbox' sent items|
|Exchange 2013 CU9 (or newer) Office 365||Exchange 2013 CU9 (or newer) Office 365||The sent mail will be delivered to the Sent Items folder of shared mailbox and to the user mailbox' sent items|
Note: if after installation of Exchange 2013 CU9 in an on-premises environment you do not see the new CMDlet parameters, you should run /preparead explicitly with CU9 setup.
set-mailbox <mailbox name> -MessageCopyForSentAsEnabled $TrueFor emails Sent On Behalf of the shared mailbox:
set-mailbox <mailbox name> -MessageCopyForSendOnBehalfEnabled $True
set-mailbox <mailbox name> -MessageCopyForSentAsEnabled $FalseFor emails Sent On Behalf of the shared mailbox:
set-mailbox <mailbox name> -MessageCopyForSendOnBehalfEnabled $False
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