Email Sync Problems

How to View Replies Sent From a Shared Mailbox in Outlook

Olivia Miller Oct 9, 2026 870 views

Question details

Users need a way to view and track email replies sent by different team members from a single shared mailbox.

How to View Replies Sent From a Shared Mailbox in Outlook

Product: Microsoft Outlook
Device & OS: not provided
Scenario: Multiple team members are collaborating, reading, and replying to emails using a shared mailbox in Outlook.
Observed behavior: Replies sent from the shared mailbox are saved in the individual sender's personal Sent Items folder rather than the shared mailbox, breaking conversation tracking for the rest of the team.

Before you start

Ensure you have the necessary administrative permissions in Microsoft 365 or Exchange to modify shared mailbox behaviors, and verify that all users have 'Send As' or 'Send on behalf' permissions.

Solution 1Recommended

Configure Sent Items via Microsoft 365 Admin Center

This is the best method to ensure that all replies from any team member are automatically saved to the shared mailbox's Sent Items folder globally.

By default, Exchange routes sent messages to the primary user's personal Sent Items. Adjusting the shared mailbox settings in the Admin Center changes this behavior at the server level, ensuring conversation views work reliably across all Outlook clients.

Log in to the Admin Center

Navigate to the Microsoft 365 admin center (admin.microsoft.com) and log in with your administrator credentials.

Locate Shared Mailboxes

In the left navigation pane, expand 'Teams & groups' and select 'Shared mailboxes'.

Select the Target Mailbox

Click on the specific shared mailbox you want to configure to open its properties panel.

Edit Sent Items Settings

Scroll down to the 'Sent items' section and click on 'Edit'.

Enable Item Copying

Toggle on both 'Copy items sent as this mailbox' and 'Copy items sent on behalf of this mailbox', then click 'Save'. Note that it may take a few hours for the changes to propagate to all users.

Configure Sent Items via Microsoft 365 Admin Center

Propagation Time: Once configured, future emails sent from the shared mailbox will automatically appear in the shared Sent Items folder. Past emails will not be moved retroactively.

Solution 2

Enable DelegateSentItemsStyle via Windows Registry

If you do not have server admin access, you can force the classic Outlook desktop client to save sent emails to the shared mailbox using a registry modification.

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Frequently Asked Questions

Why do replies from a shared mailbox go to my personal Sent Items by default?

By default, Exchange and Outlook are designed to store sent emails in the personal Sent Items folder of the actual authenticated user who clicked 'Send', regardless of which mailbox the email was sent from. This requires explicit configuration to change.

Will Conversation View work correctly after changing the Sent Items setting?

Yes. Once the shared mailbox is configured to save a copy of sent items in its own folder, Outlook's Conversation View can properly match outgoing replies with incoming messages, keeping the entire thread visible to all team members.

Do these shared mailbox settings apply to the New Outlook for Windows?

The server-side Microsoft 365 Admin Center settings apply globally and will work across Classic Outlook, New Outlook, and Outlook on the Web. However, client-side registry fixes (like DelegateSentItemsStyle) do not work in the New Outlook.

Outlook & Email Problems