Opening a shared mailbox in Outlook depends on how your organization set it up
A shared mailbox is an email account that multiple people can access and send from — useful for team inboxes like support@company.com or info@department.org. How you open it in Outlook depends on whether your organization uses Microsoft 365 (the cloud version) or an older on-premises Exchange server. The steps also differ slightly between Outlook on the web, Outlook desktop, and Outlook mobile.
The fastest way to find out which version you have is to ask your IT department or email administrator. They can tell you whether the shared mailbox is already added to your account or whether you need to request access first. If it is already added, you may only need to refresh Outlook or restart the process to see it.
Key Takeaways
- Your IT department must grant you permission to access the shared mailbox before you can open it in Outlook.
- In Outlook on the web, shared mailboxes appear in the folder list on the left side once you have access.
- In Outlook desktop, you may need to add the shared mailbox manually through File > Account Settings > Delegate Access or by using the Open Shared Folder command.
- After adding a shared mailbox, you can send emails from it by selecting it in the "From" field when composing a message.
- Mobile versions of Outlook may not support shared mailboxes, depending on your organization's setup and your phone's operating system.
Opening a shared mailbox in Outlook on the web
If you use Outlook on the web (the browser version at outlook.office.com or your company's email portal), shared mailboxes usually appear automatically in the folder list on the left side once your administrator grants you access. Look for the shared mailbox name below your own inbox. Click it to open the shared mailbox and view its emails.
If you do not see the shared mailbox listed, sign out completely and sign back in. This forces Outlook to refresh your permissions. Wait a few minutes after your administrator grants access before trying this — permission changes can take up to 30 minutes to appear in the web version.
Once the shared mailbox is open, you can read, reply to, and forward emails just as you would in your own inbox. To send a new email from the shared mailbox address, click "New Message," then click the "From" field and select the shared mailbox address from the dropdown menu.
Opening a shared mailbox in Outlook desktop (Windows and Mac)
In Outlook desktop, the process depends on your version and your organization's setup. For Microsoft 365 accounts, the shared mailbox should appear in your folder list automatically once access is granted. If it does not appear within 30 minutes, close Outlook completely and reopen it.
If the shared mailbox still does not appear, you can add it manually. In Outlook for Windows, go to File > Open & Export > Open Other User's Folder. Enter the shared mailbox address (for example, support@company.com) and click OK. In Outlook for Mac, go to Tools > Accounts, select your email account, then click Advanced and look for the option to add a shared mailbox.
If you are using an older version of Outlook or an on-premises Exchange server, your administrator may need to set up delegate access instead. Ask them whether they have already done this or whether you need to request it separately.
Sending emails from a shared mailbox in Outlook
Once the shared mailbox is open, you can send emails from it. When you compose a new message, click the "From" field at the top. A dropdown menu will appear showing your own email address and any shared mailboxes you have access to. Select the shared mailbox address you want to send from.
The recipient will see the shared mailbox address in the "From" field, not your personal email address. This is useful for team communication because it makes clear that the email came from the team inbox, not from one individual. Replies go back to the shared mailbox, where any team member with access can see and respond to them.
If the "From" field does not show the shared mailbox as an option, your administrator may not have granted you send-as permission. Contact them to request this access.
Checking shared mailbox access on your account
To confirm that you have access to a shared mailbox, go to your account settings. In Outlook on the web, click the gear icon in the top right, then select "View all Outlook settings" > "Mail" > "Shared mailboxes." You will see a list of all shared mailboxes assigned to your account.
In Outlook desktop for Windows, go to File > Account Settings > Account Settings, then click the "Mailboxes" tab. Any shared mailboxes you have access to will be listed there. If a shared mailbox is listed but not appearing in your folder view, try closing and reopening Outlook.
If you do not see the shared mailbox listed in your account settings, your administrator has not yet granted you access. Ask them to add your email address to the shared mailbox permissions.
Troubleshooting shared mailbox problems
If you can see the shared mailbox in your account settings but cannot open it, try signing out of Outlook completely and signing back in. Close the process entirely — do not just switch accounts. This clears the cache and forces Outlook to reload your permissions.
If the shared mailbox appears in Outlook on the web but not in Outlook desktop, the two versions may be out of sync. In Outlook desktop, go to File > Account Settings > Account Settings and click "Change" next to your email account. Click "Next" and then "Finish" without making any changes. This refreshes the connection to your mailbox.
If you still cannot access the shared mailbox after these steps, contact your IT department or email administrator. They can check whether your account has the correct permissions and whether the shared mailbox is configured correctly on the server side.
Shared mailboxes on Outlook mobile apps
Outlook mobile apps (on iPhone, iPad, or Android) have limited support for shared mailboxes. Some organizations allow shared mailbox access on mobile, while others do not. Ask your IT department whether shared mailboxes are available on your phone or tablet.
If your organization does support mobile access, the shared mailbox should appear in your folder list in the Outlook app once you add your email account. The process is the same as adding your personal email — you sign in with your credentials, and Outlook automatically loads any shared mailboxes you have access to.
If the shared mailbox does not appear in the mobile app even though you have access on the web and desktop, your organization may have restricted mobile access for security reasons. Check with your IT department about whether this is intentional.
Frequently Asked Questions
Can I remove a shared mailbox from my Outlook if I no longer need it?
In Outlook on the web, you cannot remove a shared mailbox yourself — your administrator must do this. In Outlook desktop, you can right-click the shared mailbox folder and select "Remove Shared Mailbox" or similar option, but this only removes it from your view. Your administrator controls whether you actually have access to it.
What happens if I delete an email from a shared mailbox?
Deleting an email from a shared mailbox removes it for everyone who has access to that mailbox, not just for you. Be careful when deleting shared emails, especially if they contain important information. Some organizations set up shared mailboxes with retention policies that automatically delete old emails after a certain period.
Can I set up rules or filters for a shared mailbox?
In Outlook on the web, you can create rules for a shared mailbox if you have owner or manager permissions. In Outlook desktop, rule creation for shared mailboxes depends on your version and permissions. Ask your administrator whether you have the right level of access to create rules.
Why does the shared mailbox show in my account settings but not in my folder list?
This usually means Outlook has not fully synced your permissions yet. Close Outlook completely and reopen it. If it still does not appear after 30 minutes, sign out of your email account in Outlook settings and sign back in. If the problem persists, contact your IT department.
Can I send from a shared mailbox if I do not have owner permissions?
It depends on what your administrator set up. Some shared mailboxes grant send-as permission to all members, while others restrict it to owners or managers. If you cannot select the shared mailbox in the "From" field, ask your administrator to grant you send-as permission.