In order to change user permissions, you have to be logged in as a user with Admin permissions. Then you'll be able to change permissions for a particular user.
See below for details.
Go to Accounts management page
![](https://media.screensteps.com/image_assets/assets/005/065/515/original/dcedd051-c5a8-4983-bdd9-5d41a81368e1.png)
Click Edit user details
Select the new set of permissions for the user and confirm the change.
![](https://media.screensteps.com/image_assets/assets/005/049/936/original/9d9608da-dccd-4c48-817a-5addbea30a71.png)
There has to be at least one user with Admin permissions within the Company account.