What a shared inbox is and when you need one

A shared inbox in Outlook is a mailbox that multiple people can access and manage together. Instead of forwarding emails to each other or copying people on every message, everyone with permission sees the same inbox, reads the same emails, and can send replies from that shared address. It's useful when a team handles customer support, a department manages a general email address, or a small business wants one person to cover another's mail during absence.

Outlook lets you add a shared inbox in two ways: through a shared mailbox (which requires your organization's administrator to set up) or by adding someone else's calendar and mailbox to your own Outlook window if they've already given you permission. This guide covers both paths so you can start using the shared inbox right away.

Key Takeaways

  • A shared inbox requires your administrator to create it first — you cannot set one up yourself if you work in an organization with an Exchange server.
  • Once your administrator creates the shared mailbox, you add it to Outlook by opening File, then Account Settings, then Account Settings again, then New, and selecting the shared mailbox from the list.
  • If someone has already shared their mailbox with you, you can add it directly through Outlook by right-clicking the folder pane and selecting "Add Shared Mailbox".
  • After you add a shared inbox, it appears as a separate folder in your left sidebar, and you can send emails from that address by selecting it in the "From" field when composing.
  • Shared inboxes work best when your organization has set clear rules about who can access what and when people should check the shared folder.

Ask your administrator to create the shared mailbox first

If you work for an organization with an Exchange server (most companies and schools), someone with admin rights must create the shared mailbox before you can add it to Outlook. You cannot create one yourself. Contact your IT department or the person who manages your email system and tell them you need a shared mailbox created. Give them the name you want it to have — for example, "support@company.com" or "scheduling@department.org".

Your administrator will also need to grant you permission to access it. Ask them to confirm that your user account has "Full Access" permission to the shared mailbox. Without this permission, Outlook will not show it as an option when you try to add it. Once they confirm permission is set, you can move to the next step.

Add the shared mailbox through Outlook settings

Open Outlook on your computer. Click the File menu in the top left corner. From the menu that appears, select Account Settings, then click Account Settings again (it appears twice in the dropdown). A window titled "Account Settings" will open.

In this window, find the tab labeled Email at the top. Make sure you are on that tab. Below the list of email accounts, you will see a button labeled New. Click it. A dialog box will appear asking what type of account you want to add. Select Mailbox or Shared Mailbox (the exact wording depends on your version of Outlook). Outlook will then show you a list of shared mailboxes your administrator has given you permission to access. Select the one you want and click Next, then Finish.

Outlook will close the settings window and return to your inbox. The shared mailbox now appears in your folder list on the left side of the screen, usually below your own inbox. It may take a few seconds to load the first time.

Add a shared mailbox if someone has already shared it with you

If a coworker has already shared their mailbox with you (rather than your administrator creating a new shared mailbox), you can add it directly without going through settings. In Outlook, look at the left sidebar where your folders are listed. Right-click in the empty space below your inbox or any folder. A menu will appear. Select Add Shared Mailbox or Open Shared Mailbox (wording varies by version).

A dialog box will ask you for the email address of the person whose mailbox you want to access. Type their full email address and click OK. Outlook will verify that they have shared it with you. If permission is set correctly, their mailbox will appear in your folder list within a few seconds. If you see an error message, ask the person who shared it to double-check that they gave your account the right permissions.

Send emails from the shared inbox

Once the shared mailbox appears in your folder list, you can read emails in it just like your own inbox. To send an email from the shared address instead of your personal address, open a new message by clicking New Email or pressing Ctrl+N. Look at the top of the compose window where it says From. Click the dropdown arrow next to your name. A list of email addresses will appear — your personal address and any shared mailboxes you have access to. Select the shared mailbox address. Now when you send the email, it will come from that shared address, not from you personally.

This is important: if you do not change the "From" field, the email will go out under your own name, and the recipient will reply to you, not to the shared inbox. Always check the "From" field before hitting Send if you are working with a shared mailbox.

Manage permissions and troubleshoot access problems

If you added the shared mailbox but cannot see any emails in it, or if you can see it but cannot send from it, the problem is usually permissions. Ask your administrator to check that your account has "Full Access" permission for that mailbox. Sometimes permission takes a few minutes to explore after it is granted. Close Outlook completely and reopen it — this forces Outlook to refresh your permissions.

If the shared mailbox does not appear in your folder list at all after you tried to add it, your administrator may not have granted you access yet. Ask them to confirm your account name is spelled correctly and that they have saved the permission change. Once they confirm, close and reopen Outlook again.

If you no longer need access to a shared mailbox, you can remove it from your folder list. Right-click the shared mailbox name and select Remove or Delete Folder. This does not delete the mailbox itself — it only removes it from your view. The mailbox continues to exist on your organization's server.

Set up rules and notifications for the shared inbox

Because a shared inbox receives mail from multiple people, it can get crowded fast. You can create rules to organize incoming messages. Click File, then Manage Rules & Alerts (or Rules, depending on your version). Click New Rule. You can set up a rule that automatically moves certain emails to a subfolder, marks them with a color, or flags them for follow-up. For example, you might create a rule that moves all emails from a specific sender into a subfolder labeled "Invoices" so they do not clutter the main shared inbox.

You can also set notifications so you know when new mail arrives in the shared inbox. Right-click the shared mailbox folder and select Properties or Folder Properties. Look for a tab labeled General or Notification. Check the box that says "Show an alert" or "Notify me of new mail". Now Outlook will alert you when someone sends an email to the shared address.

Frequently Asked Questions

Can I add a shared inbox on my phone or tablet?

Yes, but the steps differ slightly from the desktop version. On iPhone or iPad, open the Outlook app, tap the Settings icon (gear), then tap your email account. Scroll down and tap "Add Shared Mailbox". Type the email address of the shared mailbox and tap Done. On Android, the process is similar: open Settings, select your account, and look for an option to add a shared mailbox or folder.

What happens if I delete an email from the shared inbox?

The email is deleted for everyone who has access to that shared mailbox, not just for you. Before you delete something, make sure no one else needs it. If you are unsure, move it to a subfolder instead of deleting it permanently. You can always move it back later.

Can I set an out-of-office message for a shared inbox?

No, out-of-office messages are tied to your personal account. If you need to let people know the shared inbox is not being monitored, ask your administrator to add a note to the mailbox description, or set up an automatic reply rule that sends a specific message to certain senders.

Why does the shared mailbox not show up even though my administrator said I have access?

Permission changes sometimes take 30 minutes to an hour to take effect across Microsoft's servers. Close Outlook completely, wait a few minutes, and reopen it. If it still does not appear, ask your administrator to verify that your account name is spelled exactly right in the permission settings and that they clicked Save.

Can multiple people send from the shared inbox at the same time?

Yes. Multiple people can compose and send emails from the shared address simultaneously. However, only one person can edit a single email draft at a time. If two people try to edit the same unsent message, the second person will see a message saying the email is locked.