Comments on: Managing Shared Mailbox Sent Items Behaviour in Exchange Server 2013 and Office 365

By: Tony Bennett

Tony Bennett — Wed, 02 Mar 2022 15:37:22 +0000

I’m trying to resolve an issue with Exchange 2013 CU23 in a hybrid scenario, where the shared mailbox is on-premises and the mailbox sending as the shared mailbox is on Exchange Online. Values for both -MessageCopyForSentAsEnabled and -MessageCopyForSendOnBehalfEnabled are True, yet when the email is sent as the shared mailbox from the Exchange Online user, the messages get copied to the user’s own Sent Items folder but they are never copied to the shared mailbox Sent Items folder in the on-premises mailbox.

Has anyone seen this behaviour?

By: Phil Hershkowitz

Phil Hershkowitz — Wed, 28 Aug 2019 22:44:07 +0000

The MessageCopyForSentAsEnabled and MessageCopyForSendOnBehalfEnabled settings can now be applied to a user mailbox. See this article:

Automatically save sent items in delegator’s mailbox | Microsoft Docs
https://docs.microsoft.com/en-us/exchange/recipients-in-exchange-online/manage-user-mailboxes/automatically-save-sent-items-in-delegator-s-mailbox

By: Jan

Jan — Sun, 14 Apr 2019 12:05:47 +0000

Is it possible to set up MessageCopyForSentAsEnabled $true for all shared mailboxes and newly created without writing powershell command. For example to set it up in some config file to be still valid?

By: Quyen Ngo

Quyen Ngo — Thu, 31 Jan 2019 03:46:04 +0000

Hi Paul, when the user mailbox and shared mail are all on-premises, the user can send mail from shared mail, but when the user is moved to cloud, it can not send. Have you and idea for this issue? Thanks!

By: Stephane

Stephane — Mon, 06 Nov 2017 08:10:03 +0000

In reply to Paul Cunningham.

Hi Paul,

I tried the command you suggested and sadly, a copy of the sent email is still in the shared mailbox.

But then I tried this https://support.microsoft.com/en-us/help/2843677/messages-sent-from-a-shared-mailbox-aren-t-saved-to-the-sent-items-fol and it does work, but unfortunately it’s a client-side modification. But at least there is a way.

By: Paul Cunningham

Paul Cunningham — Thu, 02 Nov 2017 22:34:24 +0000

In reply to Tony. Try it with cached mode enabled. I believe it requires cached mode to work.

By: Tony

Tony — Thu, 02 Nov 2017 14:16:06 +0000

In reply to Paul Cunningham. Very similar situation here. On Prem Exchange 2013 CU15 and not using cached mode. Shared mailboxes set up correctly but within Outlook 2013 or 2016 if user sends on behalf of the , Sent items of Sender is populated but nothing is delivered to Shared mailbox/Sent Items. BUT, if same user uses OWA and sends on behalf of , both Sender and Shared Mailbox Sent Items are populated as expected. Any help/suggestion is appreciated! Thanks in advance!

By: Paul Cunningham

Paul Cunningham — Mon, 18 Sep 2017 23:54:16 +0000

In reply to Kapil Kashyap. Not at this time. No idea if they plan to add that feature in future.

By: Kapil Kashyap

Kapil Kashyap — Sun, 17 Sep 2017 06:00:13 +0000

Hi Paul,

Nice article !

I am successfuly able to execute the commands resulting in saving the copy of sent mails in Shared mailbox Sent items.

Is there any way we can “stop these sent mails to be saved in the primary mailbox” account and are only being saved in shared mailbox sent items.

Please let me know if this can be achieved ?

Thanks,
Kapil

By: Lance Haeden

Lance Haeden — Fri, 21 Jul 2017 07:03:04 +0000

I am seeing odd behaviour where when MessageCopyForSentAsEnabled is $true – the sent email is saved to Shared box ‘Sent items” BUT ALSO to EVERY Members sent Items (so not just the user who ‘sent as’).

Anyone seen that?

Thanks
Lance