As a Cogmotive Office 365 Reports administrator you can delete the user accounts of your staff.
To delete a user account firstly log in to the reporting application as an Administrator.
Now click the User Management link in the left hand navigation menu or at the top of the screen. This will show you all the users with access to your Office 365 Reporting application.
Click the Delete button next to the user account you wish to delete to remove their access to the reporting application.