How to Add a Shared Mailbox in Outlook for iOS App

To add a shared mailbox in Outlook for iOS, sign in with the work or school account that has permission to access it, open Outlook settings for that account, and choose Add Shared Mailbox. Enter the mailbox’s email address, then open it from your account list. You need delegated access from your organization; the shared mailbox’s password is not normally used.

A shared mailbox lets a team read and manage messages from an address such as support@company.com, without everyone signing in as that mailbox. The exact buttons can vary slightly between Outlook app versions, but the setup and permission requirements are the same.

What You’ll Need

Outlook for iOS: Install or update Microsoft Outlook from the App Store. The steps below apply to the Outlook app, not Apple Mail.
Your work or school account: Sign in to Outlook with the Microsoft 365 or Exchange account that your organization gave access to the shared mailbox.
Permission to the mailbox: An administrator or mailbox owner must grant you access, usually as a member or delegate. If you need to send messages as the shared address, ask specifically for Send As or Send on Behalf permission as well.
The shared mailbox address: Have its full email address ready. You do not generally need, or should not be given, a separate shared mailbox password.
An internet connection: Outlook needs to connect to your organization’s Exchange service to add the mailbox and load its folders.

Step-by-Step

Confirm you are signed in to the right account. Open Outlook on your iPhone or iPad. Tap your profile picture or initials in the upper-left corner to open the account and folder panel. Check that the account shown is the work or school account that has access. If you have more than one account, selecting the wrong one can make the shared mailbox unavailable even when your other account has permission.
Open Outlook settings. In the profile and folder panel, tap the gear icon. If you do not see it immediately, look near the bottom of the panel. In some app versions, the profile picture opens a compact account menu; tap the gear there to reach Settings. Do not use the iPhone’s Settings app for this step: the mailbox is added inside Outlook.
Choose the account that has access. In Settings, find the Mail Accounts or Accounts section and tap the work or school account you checked in step 1. If the app displays accounts directly, select the account used to access the mailbox. This associates the shared mailbox with your authorized sign-in rather than creating a new, separate login.
Tap Add Shared Mailbox. Look in the selected account’s settings for Add Shared Mailbox. Depending on the Outlook version, you may see this option on the account details screen or after tapping the account’s menu. If the option is not visible, see Troubleshooting below before trying to add the mailbox as a regular email account.
Enter the shared mailbox address. Type the complete address, for example support@company.com, and check the spelling and domain. If Outlook asks you to choose an account, select the work or school account that was granted access. Follow any on-screen prompts to finish. Do not enter a password for the shared mailbox unless your organization has explicitly configured a different account type and its administrator has instructed you to do so.
Wait for Outlook to add it. Give the app a moment to contact Exchange and load the mailbox. A successful addition usually returns you to the account or folder list. If Outlook reports that it cannot find the mailbox or that you do not have permission, note the exact message; it can help your administrator distinguish an address error from a permission or service problem.
Open the shared mailbox. Tap your profile picture or initials again. The shared mailbox should appear alongside your personal work account in the account list. Tap its name or address to switch to its folders. Open Inbox, Sent Items, or another folder to confirm that the mailbox is accessible. Mail in the shared mailbox is separate from the messages in your personal inbox.
Check whether you can send from it. Open a new message while viewing the shared mailbox, or start composing and inspect the From address if that field is available. Choose the shared address if Outlook does not select it automatically. Send a brief test only if appropriate for your workplace. Being able to read a mailbox does not automatically mean you have permission to send as it; ask the mailbox owner or administrator to grant the required sending permission if needed.
Allow time for permissions to take effect. If access was just granted, close and reopen Outlook, then check the mailbox again. Permission changes can take time to reach the app. If it still does not appear after a reasonable wait, verify that the permission was assigned to the exact account you use in Outlook and contact your administrator rather than repeatedly adding the same address.

Common Mistakes

Adding it as a normal account: A shared mailbox is usually accessed through your own authorized account. Choosing Add Email Account and trying the shared address as a standalone sign-in can lead to password or authentication errors. Use Add Shared Mailbox instead.
Using the wrong work account: Access granted to one address does not necessarily apply to another account on the same phone. Check the selected account in Outlook settings before adding the mailbox.
Assuming a mailbox address grants access: Knowing the address is not enough. A mailbox owner or administrator must grant your account permission on the organization’s Exchange system.
Expecting send permission with read access: Reading and sending are separate capabilities. Request the specific permission you need, such as Send As, and allow the change to take effect.
Removing and re-adding it repeatedly: Repeating setup will not fix missing permissions or an incorrect address. Confirm the address and access first, then retry once the underlying issue is resolved.

Tips

Keep the personal and shared inboxes distinct. Check the account name at the top of the folder list before reading, moving, or replying to a message. This helps prevent replies from going to the wrong From address.
Use the full address when requesting access. When contacting IT, provide the exact shared mailbox address and the work account you use to sign in. State whether you need to read, manage, or send messages from the mailbox.
Check the From field before sending. When replying to a message received by the shared mailbox, verify which address Outlook will use. If the shared address is unavailable, do not assume that a reply will automatically come from it.
Keep Outlook up to date. App updates can change menu placement and address bugs. If a menu differs from these steps, look in the selected work account’s settings for the shared-mailbox option rather than adding a second sign-in.
Remember that mobile notifications may differ. A mailbox appearing in Outlook does not guarantee that every shared-folder message will trigger a notification on your device. Check Outlook’s notification settings and the folder you are monitoring, and use your organization’s preferred process for urgent messages.

Troubleshooting

“Add Shared Mailbox” is missing. Make sure you are using the Outlook app and have selected the correct work or school account in Outlook settings. Update the app from the App Store and reopen it. If the option is still absent, your account type or organization’s configuration may not support this setup in the app. Ask your Microsoft 365 or Exchange administrator whether the mailbox is hosted on a supported service and whether mobile access is allowed.

Outlook says it cannot find the mailbox. Check the complete address, including the domain, and ask the owner or administrator to confirm that it is a shared mailbox and is active. A display name or alias may not work in every prompt, so try the mailbox’s primary email address. If the address is correct, ask IT to check that the mailbox exists in the organization’s directory.

You get an access or permission error. Ask the mailbox owner or administrator to confirm that your exact work account has been granted access. If they have just added you, wait for the change to propagate, then close and reopen Outlook. Signing out and back in may refresh the account, but do that only if you know your work sign-in details and can complete any organization-required verification.

The mailbox appears, but folders are empty or do not update. Check that the phone has a working connection, switch to another folder and back, and refresh the view if that control is shown. Close and reopen Outlook. If messages are missing for everyone, the issue may be with the mailbox or Exchange service rather than your iPhone; ask a colleague with access or contact IT to check.

You can read messages but cannot send from the shared address. Ask for the appropriate Send As or Send on Behalf permission. Then allow the permission change to take effect, reopen Outlook, and check the From field in a new message. Do not send a message from your personal address as a substitute if it could confuse recipients or violate your organization’s process.

The menu names do not match these steps. Outlook for iOS changes its layout over time, and work organizations can manage app features. Start from the profile or account panel, open the gear-shaped Settings menu, and select the authorized work account. If the shared mailbox option is still not there, send IT your Outlook app version, iOS version, account type, and any error text so they can give guidance for your configuration.

Frequently Asked Questions

Can I add a shared mailbox to Outlook for iOS without a password?

Usually, yes. You sign in with your own authorized work or school account, and Outlook uses that account’s permission to open the shared mailbox. Do not ask for or use a shared mailbox password unless your administrator specifically says the mailbox is configured differently.

Why can’t I see Add Shared Mailbox in Outlook?

First select the correct work or school account in Outlook settings and confirm that you are using the Outlook app. Then update the app and check the account’s settings again. If the option remains missing, ask IT whether the account and mailbox configuration support shared mailbox access in Outlook for iOS.

Can I add a shared mailbox from a personal Outlook.com account?

Shared mailbox access is generally an Exchange or Microsoft 365 work or school feature. A personal Outlook.com account will not gain access just because you know a work mailbox’s address. Use the work account that was granted permission, or ask the organization’s administrator about an approved way to access it.

Can I send email as the shared mailbox?

Only if your organization has granted the relevant sending permission. Read access alone may let you view messages but not send as the shared address. Ask the mailbox owner or administrator for Send As or Send on Behalf permission, then check the From address before sending.

Will adding it on my iPhone also add it to Outlook on my computer?

Adding it in the iOS app changes that app’s account list; it does not necessarily add it manually to every device. Your organization may configure mailbox access automatically in desktop Outlook, or you may need to add it there separately. Ask IT if you need the mailbox on another device.

How do I remove a shared mailbox from Outlook for iOS?

Open Outlook Settings, select the work account associated with the mailbox, and look for the shared mailbox in that account’s settings. Use the available remove option, if shown. Removing it from the app does not delete the mailbox or revoke your organization-level permission; contact IT if access itself should be removed.

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