Your options to retrieve the account and password you use to sign in and install or reinstall Office, or to manage your Office 365 subscription vary depending if your product is part of Office for home or Office for business.
How to Recover Username of Microsoft Office Account?
If you Forgot your username of Microsoft Office Account, you can recover it by the given options:
- Open an Office 2016 app to see your username
- Use your product key
- Look for emails
1. Open an Office 2016 App to See Your Username:
Open any Office application. (Word, Excel, PowerPoint etc.)
Click on File menu.
Under Product Information is the name of your Office product and the phrase, Belongs to: along with the account associated with this version of Office.
2. If you have one, use the product key you previously redeemed for Office 2016 or Office 2013:
Go to www.office.com/setup.
Enter a Microsoft account or follow the prompts to create a new one.
After signing in, type the 25-character key that came with your copy of Office.
On the My Office Account page, you’ll see a portion of the Microsoft account you used to buy or activate Office, or that you used when you first signed in to My Account.
Select the link Sign in with your other Microsoft account, and then sign in with the correct Microsoft account.
3. Look for emails from Microsoft:
Check other email accounts you use regularly for emails from Microsoft or Office about your account. They may mention your account name.
for more details, visit: office.com/setup.