How to change an email account’s name in Outlook?

To change the name of an email account in Outlook, please do as follows:

1. Click File > Info > Account Settings > Account Settings to open the Account Settings dialog box.

2. In the Account Settings dialog box, please (1) enable the Data Files tab, (2) click to highlight the email account you will rename, and then (3) click the Settings button. See screenshot:

3. In the Outlook Data File dialog box, please type a new account name into the Name box, and click the OK button. See screenshot:

4. Close the Account Settings dialog box.
Now you return to the main interface of Outlook, and you will see the specified email account has been renamed on the Navigation Pane. See screenshot:

Automatically reply with the default email account in Outlook

In general, Outlook can identify the email account that the active email belongs to, and then reply with this email account automatically. However, with Kutools for Outlook's Always reply with default account option, no matter which email account the active email belongs to, it will be replied with the default email account in you Outlook.

Rename the profile in Outlook

Send emails with alias in Outlook