You need to get a valid subscription for the offices 365 to trigger the user accounts. Adhere to the below-mentioned instructions to get through this procedure:
Go to the browser and open the office 365 portal.
Make Certain to log in as an administrator.
When the administrator portal opens, then select the user with activation issues on the perfect side.
Whilst selecting the user, you will need to fix the office 365 subscription and see whether it's delegated or not.