How to add a second email account to Outlook?

In the browser version, you can only use one account. However, if the email address you want to add is a shared mailbox, you can add it.

<Japanese>
ブラウザ版では１つのアカウントしか利用出来ません。
但し、追加したいメールアドレスが共有メールボックスであれば追加する事が出来ます。

To add a second email account to Outlook, you can follow these steps:

1. Open Outlook and go to the File menu.
2. Select Add Account.
3. Enter the email address of the second account you want to add and select Connect.
4. If prompted, enter the password for the second email account and select Sign in.
5. Once the account is successfully added, you may need to restart Outlook to see the new account in your account list.

If you do not see the option to add an account, ensure that you are in the correct section of Outlook and that your Outlook version supports adding multiple accounts.

Additionally, if you are using the new Outlook for Windows, you may need to authenticate your accounts manually if they are not automatically recognized.

References:

• Set up Outlook for Microsoft 365 for business email
• Supported accounts in new Outlook for Windows