Using classic Outlook for Windows in business environments
Hello, Thanks for reaching out. I'm Dave, a Microsoft Outlook user just like yourself. I'm happy to be helping other users in the community! You should be able to change the name in which you see your email accounts by going to File-> Account Settings> Account Settings, double clicking the account in question, then changing the “Account name” field. Kind Regards, Dave Microsoft Community Member
Like Outlook for web, changing the name on Outlook new is not supported right now. Please do send feedback using the Help option to let Microsoft know your thoughts.