How To Add A Shared Mailbox In Outlook
A practical step-by-step guide to how to add a shared mailbox in outlook, including preparation, instructions, common issues, tips, and next steps.
How To Add A Shared Mailbox In Outlook
Adding a shared mailbox in Outlook lets you view and send emails from a team address, like info@yourcompany.com, without logging out of your own account. This guide walks you through both the desktop app and Outlook on the web, helping you finish in about five minutes. Before you begin, check that your IT department has granted you permission, or the shared mailbox will not appear.
Fast Answer
- Add it: In Outlook desktop, select File, then Account Settings, then your email, then Change, then More Settings, then Advanced, then Add.
- Permissions: Must be granted by an admin or mailbox owner first.
Before You Start
- You need an active Microsoft 365 or Exchange work or school account. Shared mailboxes do not work with free personal Outlook accounts.
- You need the full email address of the shared mailbox, for example, sales@yourcompany.co.uk.
- You must have been granted at least Read and Manage permissions to the shared mailbox by your IT administrator or the mailbox owner.
- Close any other Outlook windows on your computer before you start the desktop app setup.
Step-by-Step Instructions
Open Account Settings in Outlook Desktop
Open Outlook on your computer. Click the File tab in the top-left corner of the window. In the menu that appears, click Account Settings, then choose Account Settings again from the drop-down list. A new window will open showing all the email accounts linked to your Outlook profile.
Select Your Email Account and Open Change Settings
In the Account Settings window, find the email account you use for work or school. Highlight it by clicking once on it. Then click the Change button located above the account list. This opens the settings for that specific account and lets you modify how it connects to the server.
Open More Settings and the Advanced Tab
In the Change Account window, click More Settings in the bottom-right corner. A new dialog box will appear with several tabs across the top. Click the Advanced tab. This is where Outlook stores the list of mailboxes that are linked to your main account.
Click Add and Type the Shared Mailbox Address
Look for a section labeled Open these additional mailboxes. Click the Add button next to this section. Type the full email address of the shared mailbox, for example, sales@yourcompany.co.uk, into the text field. Click OK to confirm. The mailbox address will now appear in the list.
Apply the Changes and Restart Outlook
Click OK to close the More Settings window. Then click Next and finally Finish in the Change Account window. Close the Account Settings window entirely. Now close Microsoft Outlook completely and reopen it. The shared mailbox will appear as a new folder in the left navigation panel, usually listed under your main mailbox.
Add the Shared Mailbox in Outlook on the Web
If you prefer to use Outlook in your browser, the process is even simpler. Go to the Microsoft 365 portal at office.com and sign in to your account. Open Outlook from the app launcher. Right-click on Folders in the left navigation pane, then select Add shared folder. Type the email address of the shared mailbox and click Add. The shared mailbox will appear in the folder list, usually near the bottom.
Send Emails From the Shared Mailbox
Once the shared mailbox appears, you can reply to emails that arrive in it. To send a brand new email from the shared address, click New Mail. In the compose window, click the From button. A drop-down list will show the shared mailbox address alongside your own. Select the shared mailbox address, then write and send your email as normal.
Quick Reference
| Situation | Use this | Why |
|---|---|---|
| Outlook desktop on Windows | File, Account Settings, Change, More Settings, Advanced | Gives you full access to the shared mailbox list |
| Outlook on the web in a browser | Right-click Folders, then Add shared folder | Fastest method with no restart needed |
| Outlook for Mac | Tools, Accounts, Advanced, Delegates | Opens the correct permissions tab for Mac users |
| Sending email as the shared mailbox | New Mail, then click From | Lets you choose the shared address for outgoing messages |
Common Problems When You Add a Shared Mailbox in Outlook
"We couldn't find the mailbox" — This error usually means you typed the email address incorrectly, or you have not been given access yet. Double-check the spelling against your company directory. If the address is correct, contact your IT administrator and ask them to confirm your Full Access permission.
The shared mailbox is missing from the folder list — After adding the mailbox, it can take a few minutes to appear. Close Outlook, wait for 10 seconds, and reopen it. In Outlook on the web, click the refresh icon or press F5 on your keyboard to reload the page.
Emails appear blank or take a long time to load — Large shared mailboxes can slow down Outlook. Open the shared mailbox folder, click the View tab, and choose Change View, then Compact to reduce the amount of data shown on screen.
You cannot see the From button when composing — The From button is hidden by default in some versions of Outlook. Click Options in the compose window, then click the From button in the ribbon to reveal the field. If the button still will not show, you lack Send As permission.
Duplicate shared mailboxes appear — This often happens if you added the mailbox on both your desktop app and mobile device with different settings. Remove the duplicate by right-clicking the folder name and selecting Remove shared folder.
Advanced Tips for Adding a Shared Mailbox in Outlook
Set a default From address for a mailbox — If you mainly work on the shared mailbox and rarely email from your personal account, you can make the shared address the default. In Outlook desktop, go to File, then Options, then Mail. Under Compose messages, click the From field dropdown and select the shared mailbox address. Every new email you create will automatically use that address.
Add the shared mailbox to your mobile Outlook app — This is a separate process from the desktop app. In the Outlook mobile app, tap your profile picture, then tap the gear icon. Select Add Account, then choose Add a shared mailbox. Enter the shared mailbox email address, and it will appear as a separate folder in your mobile view. This only works if your organisation uses Microsoft 365 and your administrator has enabled mobile access.
Create a rule to organise shared mailbox emails — Shared inboxes often receive high volumes of mail. You can keep things tidy by setting up rules. In Outlook desktop, right-click an email in the shared mailbox, select Rules, then Create Rule. Choose a condition, for example "from a specific sender", and an action like moving it to a subfolder. This prevents the shared inbox from becoming overwhelming.
Use a favourite folder for quick access — Find the shared mailbox in your folder list, right-click it, and select Add to Favorites. It will appear at the top of your navigation pane, so you can access it with one click instead of scrolling through the full folder list.
Check your Auto Mapping setting — If you have been granted Full Access by your administrator, Outlook sometimes automatically adds the shared mailbox without you having to follow these steps. This feature, called Auto Mapping, can occasionally cause issues. If you see the shared mailbox appear but it shows errors, contact IT support to check whether Auto Mapping is enabled for your organisation.
How To Add A Shared Mailbox In Outlook FAQ
Common Issues
If the result is not working as expected, return to the previous step, check the material or setting involved, and make one adjustment at a time for how to add a shared mailbox in outlook.
Can I add a shared mailbox without admin approval?
No. Your administrator or the mailbox owner must grant you Full Access permission first. Without this permission, Outlook will not show the mailbox even if you type the address correctly. Contact your IT support team to request access.
How long does it take for a shared mailbox to appear?
Usually between 30 seconds and 5 minutes. If you have added it in the desktop app and it has not appeared after 5 minutes, close Outlook, check that your internet connection is stable, and reopen it. On the web version, refresh the browser tab.
Can I add multiple shared mailboxes?
Yes. Follow the same steps for each additional mailbox. There is no standard limit on the number of shared mailboxes you can add, though too many may slow down Outlook. Each one appears as a separate folder in your navigation pane.
Does the shared mailbox have its own password?
No. Shared mailboxes do not have usernames or passwords. You access them using your own login credentials combined with the permissions granted by your administrator. This is a security feature that ensures every action is traceable to a specific person.
Why can I read emails but not send from the shared mailbox?
This happens when you have been granted Read permission but not Send As or Send on Behalf permission. Ask your IT administrator to update your permissions. In the Microsoft 365 admin centre, they need to enable "Send As" for your account against the shared mailbox.
Will the shared mailbox appear for my colleagues too?
Each person must add the shared mailbox to their own Outlook profile individually. The permission granted by the administrator applies to specific people, not to everyone in the organisation. Therefore, each colleague who needs access must follow these same steps.
Final Checklist for Adding a Shared Mailbox in Outlook
- You have confirmed your administrator granted you Full Access and Send As permissions.
- You have the complete email address of the shared mailbox written down.
- You have closed all other Outlook windows before starting the desktop setup.
- You have followed the Advanced tab steps and clicked Add.
- You restarted Outlook and confirmed the shared mailbox appears in your folder list.
- You tested sending an email from the shared mailbox using the From button.
- You added the shared mailbox to your mobile app if you need access on the go.
Once the shared mailbox is live, check it daily like you would any other inbox. For team accounts such as sales@ or support@, agree with your colleagues who replies to which emails to avoid duplicate responses.
