Configuring preferences and options in Outlook.com
For an Outlook.com account, change the account display name in the Microsoft account profile:
- Sign in to the Microsoft account profile.
- Select Edit name.
- Make the change and select Save.
- Allow up to 24 hours for the updated name to appear everywhere.
If the goal is to change the name recipients see on sent mail, that same Microsoft account display name is used for Outlook.com.
If the issue is in classic Outlook for Windows instead of Outlook.com on the web:
- Open File > Account Settings > Account Settings.
- Select the account and choose Change.
- Update the Your name field.
If the account type is Microsoft Exchange, the display name cannot be changed in Outlook. An Exchange administrator must make that change.