How to Add a Shared Mailbox in Outlook

A shared mailbox in Outlook allows multiple users to access and manage a common mailbox, making it ideal for teams handling shared emails such as support, sales, HR, or info addresses. Shared mailboxes can be used to read and send emails, manage folders, and collaborate without requiring a separate user license in most Microsoft 365 environments.

In many cases, a shared mailbox is added automatically once the required permissions are assigned. However, there are situations where the mailbox does not appear, or users want to add it manually for better control and visibility in Outlook.

Adding a shared mailbox in Outlook depends on the Outlook version you are using and whether automatic mapping is enabled. The steps below explain all supported methods to add a shared mailbox successfully.

How to Add a Shared Mailbox in Outlook

The methods in this section explain how to add a shared mailbox in different Outlook scenarios. Follow the steps carefully based on whether the mailbox appears automatically or needs to be added manually.

1. Ensure You Have Permission to Access the Shared Mailbox

Outlook will not add a shared mailbox without proper access.

1. Confirm that your Microsoft 365 or Exchange administrator has assigned Full Access permission to the shared mailbox.
2. Wait for permission changes to sync, which may take some time.
3. Sign out and sign back in to Outlook if permissions were added recently.

Without permissions, the shared mailbox cannot be added.

2. Restart Outlook and Check Automatic Mapping

Shared mailboxes are often added automatically.

1. Close Outlook completely.
2. Reopen Outlook.
3. Check the folder pane on the left.
4. Look for the shared mailbox listed below your primary mailbox.

If automatic mapping is enabled, no manual steps are required.

3. Add a Shared Mailbox in Outlook Desktop Manually

Use this method if the mailbox does not appear automatically.

1. Open Outlook.
2. Go to File.
3. Select Account Settings > Account Settings.
4. Choose your email account and click Change.
5. Click More Settings.
6. Open the Advanced tab.
7. Click Add under Mailboxes.
8. Enter the shared mailbox email address.
9. Click OK and close all windows.
10. Restart Outlook.

The shared mailbox will now appear in the folder list.

4. Add a Shared Mailbox in New Outlook for Windows

The new Outlook uses a different interface.

1. Open Outlook (new).
2. Click Settings.
3. Go to Accounts.
4. Select Shared mailboxes.
5. Click Add shared mailbox.
6. Enter the shared mailbox email address.
7. Click Add and restart Outlook.

The mailbox will appear in the navigation pane.

5. Add a Shared Mailbox in Outlook on the Web

This method works without installing Outlook.

1. Sign in to Outlook on the web.
2. Right-click Folders in the left pane.
3. Select Add shared folder.
4. Enter the shared mailbox email address.
5. Click Add.

The shared mailbox will be listed and accessible immediately.

6. Send Email From the Shared Mailbox

Sending requires send permissions.

1. Open a new email in Outlook.
2. Click From.
3. Select the shared mailbox address.
4. Compose and send the email.

Ensure Send As or Send on Behalf permission is assigned.

7. Fix Shared Mailbox Not Showing in Outlook

If the mailbox does not appear, try the following.

1. Restart Outlook again.
2. Remove and re-add the mailbox using the manual method.
3. Clear Outlook cache if needed.
4. Confirm permissions with the administrator.

Sync delays are common after permission changes.

8. Remove a Shared Mailbox from Outlook

You can remove it without deleting the mailbox.

1. Go to Account Settings.
2. Select your email account.
3. Open More Settings.
4. Go to the Advanced tab.
5. Select the shared mailbox.
6. Click Remove and restart Outlook.

This removes it only from your Outlook view.

Final Thoughts

Adding a shared mailbox in Outlook is usually seamless once the correct permissions are assigned. In many cases, Outlook adds the mailbox automatically, but manual configuration is available when needed for greater control or troubleshooting.