If you have two or more accounts of the same type, you can customize the initials/letters we show in your app's menu bar. To do so, please go to Settings > Accounts (pick the account you'd like to customize) > Description. From here you can edit the name of your account, and the changes will be reflected as soon as you next open the sidebar.
How do I change the initials that appear in my app navigation?
Applies To
Outlook for Android Outlook for iOS