Steps:
1. Go to any office application and click the “Sign-in” button located on the upper right corner of the screen.
2. A window will appear asking you to enter your Microsoft 365 account.
3. After signing-in the credentials, check the license status of the Microsoft Office Application. To check, click the “File” tab located in the upper left corner of the screen and click the “Account”.
You should see these details(red box).