Office 365 (Outlook Client for Windows) - Add Additional Email Accounts
There are many different types of email accounts you can add to Outlook, including Gmail, Yahoo, iCloud, and Hotmail accounts. Some third-party email providers, like Gmail, Yahoo, and iCloud, require you to change some settings on their websites before you can add these accounts to Outlook. These steps are the same whether you're adding your first email account or additional ones.
1.Select File > Add Account.
2. Enter your name, email address, and the password for your additional account and then click Next.
3. If prompted, enter the password for that account again and select OK > Finish to start using your email account in Outlook. It will show up towards the bottom of your folder pane.
If Outlook won’t accept your password and you know you’re using the password for your additional email account, you might have an email account that requires additional security. Gmail, Yahoo, iCloud, Outlook.com, and AOL accounts all use two-factor authentication to help verify that you’re the person trying to access your email account. To add your email account to Outlook, you’ll need an app password, also known as an application password. This is a different password than your regular email account password. One way you'll know you need an app password is if you see the following message: 2-factor authentication is set up for your account. Please sign in using your application password.
The steps to obtain an app password are different for each email provider. Select your provider in the drop-down option within this Microsoft help article for instructions:
https://support.office.com/en-us/article/add-an-email-account-to-outlook-6e27792a-9267-4aa4-8bb6-c84ef146101b