Missing email account

Setting an account as the default only selects it for outgoing mail; in New Outlook for Mac, open the account filter in the sidebar and select All Accounts to make the account and its folders visible.^1^

Show the account in the mail list

1. In Outlook, select View > Sidebar if the folder sidebar is hidden.
2. At the top of the sidebar, select the globe/All Accounts icon rather than one of the individual account filters.
3. Expand All Accounts, then expand Inbox.
4. If Outlook combines equivalent folders into one unified Inbox, look there for the account’s messages. Outlook for Mac groups folders from multiple mail and Exchange accounts by default.^2^

Also open Tools > Accounts:

• If the address appears there, it has been added to Outlook; the issue is its sidebar display or account filter.
• If it does not appear, add it through Tools > Accounts > + Add Account, enter the address, complete authentication, and select Done.^3^

If this is a shared mailbox

Do not add a shared mailbox through the normal Add Account window. First add your main account, then:

1. Open Tools > Accounts and select the main account.
2. Select Delegation and Sharing.
3. Select Shared with me.
4. Select +, then add the shared mailbox.

Microsoft documents this as the workaround when a shared mailbox produces “Account already exists” or remains unavailable after being entered through the normal account window.^4^

If it is listed under Accounts but still remains absent

Remove and add only that account again:

1. Open Tools > Accounts.
2. Select the missing account.
3. Choose Manage > Remove Account, then Continue.^5^
4. Return to Tools > Accounts > + Add Account and complete the sign-in again.^3^

Removing the account clears its locally cached Outlook data, so allow synchronization to finish after adding it again.

If that does not resolve it, update Outlook from Help > Check for Updates. If Outlook was installed through the Mac App Store, use App Store > Updates instead.^6^

References

1. Use a screen reader to set up your email account in Outlook for Mac | Microsoft Support
2. Show separate inboxes for each account in Outlook for Mac | Microsoft Support
3. Add an email account to Outlook for Mac
4. Outlook for Mac “Account already exists” error | Microsoft Support
5. [Outlook for Mac](https://support.microsoft.com/outlook/sign-out-of-an-email-account-in-outlook-for-mac)
6. Update Office for Mac automatically | Microsoft Support