- What has to happen before a shared mailbox shows in Outlook
- Adding a shared mailbox in new Outlook for Windows
- Adding a shared mailbox in classic Outlook
- Opening a shared mailbox in Outlook on the web
- Sending and replying as the shared mailbox in Outlook
- Shared mailbox extras: calendar, contacts and automatic replies
- Running a shared Outlook inbox as a small team
- If your shared mailbox won't appear in Outlook
- Frequently asked questions
To add a shared mailbox in Outlook, ask your Microsoft 365 admin to add you as a member, then restart Outlook. It usually appears by itself; if not, right-click your account name and choose Add shared folder or mailbox. Without the admin step, it won't work at all.
A shared mailbox is the grown-up version of everyone knowing the password to info@. Several people can read and reply from one address, such as hello@ or support@, without anyone signing in as that account. It's brilliant for small teams, and a lifesaver when one person is off sick and customer emails keep arriving.
The bit people don't expect is that you can't create access for yourself. Someone with admin rights in your Microsoft 365 setup has to do the first step. After that, adding it to Outlook is quick, and I'll show you each version below.
What has to happen before a shared mailbox shows in Outlook
Microsoft's help says your Microsoft 365 admin must create the shared mailbox and add you as a member. You can try to add it in Outlook earlier, but you can't use it until the admin has added you. Microsoft also says the shared mailbox's own account should stay disabled, because users never sign in to it directly. Everyone gets in through their own account.
If you're the business owner and also the admin, that's you. If not, ask whoever manages your Microsoft 365 for access to the exact address you need.
Adding a shared mailbox in new Outlook for Windows
In many cases there's nothing to add. Once you've been given access, Microsoft says to close and restart new Outlook, and the mailbox should appear in the folder pane under Shared with me. If you were only just added, give it a few minutes before restarting.
If it still isn't there, add it by hand:
- Select Mail.
- Right-click your own account name in the folder pane.
- Select Add shared folder or mailbox.
- Enter the shared mailbox address and confirm.
Adding a shared mailbox in classic Outlook
Classic Outlook also tends to show the mailbox automatically after a restart. If it doesn't, Microsoft's manual route is longer but reliable:
- Select File, then Account Settings, then Account Settings again.
- On the Email tab, select your own account and choose Change.
- Select More Settings, then the Advanced tab, then Add.
- Type the shared mailbox address and select OK, then OK again.
- Select Next, then Finish, then Close.
The mailbox then sits in your folder pane under your own account, where you can expand its Inbox and other folders.
Opening a shared mailbox in Outlook on the web
Outlook on the web gives you two choices. To keep it in your folder list, right-click Folders, or your main mailbox name if your organisation uses Exchange on-premises, select Add shared folder or mailbox and enter the address.
To open it in its own browser tab instead, select your name or picture, choose Open another mailbox, type the address and select Open. Microsoft notes that this separate window method is the one you need if you want notifications for that mailbox.
Sending and replying as the shared mailbox in Outlook
Adding the mailbox doesn't mean every email you send comes from it. You choose the address in the From field each time.
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- Start a new email.
- If you can't see From, show it: in new Outlook, select Options, then Show From. In classic Outlook, select Options, then From.
- Select From and choose the shared address, or select Other email address and type it.
- Write and send as normal.
When replying to a message in the shared inbox, check the From line before sending and switch it if it shows your own address. Microsoft says recipients see only the shared address, which keeps your personal mailbox out of customer conversations.
Shared mailbox extras: calendar, contacts and automatic replies
| Feature | What Microsoft's help says |
|---|---|
| Shared calendar | Appears in your Calendars list after you restart Outlook |
| Shared contacts | Show under My Contacts in classic Outlook, not available in new Outlook |
| Automatic replies | Only the admin can set them up for a shared mailbox |
That last point matters at holiday time. You can set your own away message with my steps for setting up an out of office reply in Outlook, but the shared address needs the admin. If you want a team diary rather than an inbox, my guide on sharing a calendar in Outlook may be the better fit.
Running a shared Outlook inbox as a small team
The technology is the easy part. The arguments start when two people reply to the same customer, or nobody does because everyone assumed someone else had it. A few house rules help:
- Agree who checks the shared inbox first thing, and who covers when they're away.
- Use categories or flags so the team can see which emails are being handled.
- Move finished conversations out of the inbox so what's left is the real to-do list.
- Write replies in the voice of the business, not your personal style, so customers get a consistent feel.
If your shared mailbox won't appear in Outlook
- Confirm with the admin that you were added as a member of that exact address.
- Wait a few minutes after being added, then close and fully restart Outlook.
- Add it manually with the steps for your version above.
- In Outlook on the web, try Open another mailbox to check the access works at all.
- For Outlook for Mac or the phone app, Microsoft has separate help articles, and menus vary by version.
Shared inboxes work best with a few simple rules, such as who replies to what. If a team member is away, forwarding emails in Outlook can pass a thread to the right person quickly.
Frequently asked questions
Can I add a shared mailbox in Outlook without an admin?
No. Microsoft says your Microsoft 365 admin must create the shared mailbox and add you as a member before you can use it.
Do I need a password for a shared mailbox?
No. Microsoft says users don't sign in to the shared mailbox directly. You open it through your own account once you've been given access.
Why can't I see the shared mailbox in new Outlook?
Close and restart new Outlook and look under Shared with me in the folder pane. If you were just added, wait a few minutes. You can also right-click your account name and select Add shared folder or mailbox.
What do people see when I send from a shared mailbox?
Microsoft says recipients see only the shared address, as long as you chose it in the From field.
Can I set an out of office on a shared mailbox?
Not yourself. Microsoft says only the admin can set up automatic replies from a shared mailbox.
