Hi Everyone this is Prem, I have worked as Microsoft 365 support ambassador. In this blog I will share How to Fix Emails Sent from Shared Mailbox Missing Issue.
When we give a User account permission on a shared mailbox in office 365, the user can send email as shared mailbox or on behalf of shared mailbox depending on the permissions respectively.
If you want to setup Shared mailbox from scratch please refer this ARTICLE.
When the user send an email using that permission the email goes out fine but the sent email is not stored in the Sent items folders of the Shared mailbox.
The email is stored in the user’s sent items folder, this is a by default behaviour of the shared mailbox considering it does not have a license.
To save the sent email in the Sent Items folder of the Shared mailbox as well, there is an option which we have to enable, Once it is enabled, going forward any email sent by any user having permission, will be also saved in the sent items folder of the Shared mailbox respectively.
Note to keep in mind is that it saves a new copy to the sent items of the Shared mailbox, there would still be a copy in the User’s Sent Items folder of their Mailbox.
Steps to Fix Emails Sent from Shared Mailbox Missing Issue using the admin center:
Go to https://Admin.microsoft.com, or the Microsoft Admin center.
Click on Teams and Groups > then click on Shared mailboxes:
Click on the Shared mailbox on which you want to enable this feature, under Sent items, click on Edit:
Check the boxes depending on the needs and then click Save:
The above example, I have set for both Send As and Send on Behalf permission.
Give the changes 10-15 mins and check the behaviour.
If you want to update this for multiple shared mailboxes in bulk you can use the PowerShell for the same.
Steps to Fix Emails Sent from Shared Mailbox Missing Issue using the PowerShell:
We will have to connect the PowerShell to the Exchange online first.
To connect to Exchange online using PowerShell please refer this ARTICLE
Once connected you will have to run the following command respectively:
For emails Sent As the shared mailbox, run the following cmdlet:
Set-mailbox newsharedmailbox@prems.onmicrosoft.com -MessageCopyForSentAsEnabled $True
For emails Sent On Behalf of the shared mailbox, run the following cmdlet:
Set-mailbox newsharedmailbox@prems.onmicrosoft.com -MessageCopyForSendOnBehalfEnabled $True
newsharedmailbox@prems.onmicrosoft.com, is the email address of the Shared mailbox in my case.
If you dont want to make the change on the server level but want to set this up for few users on their computer level then you can use the registry method for the same.
Steps to Fix Emails Sent from Shared Mailbox Missing Issue using the Registry Editor:
Take a backup of the registry editor before performing any changes to the registry.
Click windows key+R on your keyboard, type regedit, and then click OK.
Navigate to the following path: HKEY_CURRENT_USER\Software\Microsoft\Office\x.0\Outlook\Preferences
The x.0 above is version of Office (16.0 = Office 2016, Office 2019, or Office LTSC 2021, 15.0 = Office 2013, 14.0 = Office 2010).
On the Edit menu, click on New, and then click DWORD Value.
Type DelegateSentItemsStyle, and then press Enter.
Right-click the dword, DelegateSentItemsStyle, and then click Modify.
In the Value data box, type 1, and then click OK.
Exit Registry Editor.
In this way you can set the Sent Items email to copy to the Shared mailbox when using Send As or Send on Behalf permissions.
Do let us know if you have any question.
Date: 3/05/2023
Author: Prem
Tags: Fixed Emails Sent from Shared Mailbox Missing Issue