A CMS System Administrator has access to every function offered in CMS. Specifically a CMS System Administrator can add, modify, or delete the user accounts.
In order to use the system administration function, you must be logged on at a system administrator access level. If you are already logged on at another level, you can switch users without logging off. To do so, find the User menu on the toolbar and select Switch
User as shown below:
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You will be prompted for your user name and password analogously to when you login to the system.

Next, you need to select User from the toolbar and then choose User Administration as shown here.

You will get the following dialog box. As a system administrator, you have three capabilities you can use:
Adding User Accounts
You will be prompted for the group, a unique user name (this is what the user must type when logging in), the user's full name, description (this may be left blank).
Modifying User Accounts

You can edit every field except Username. The only way to change the username of the account is to delete that account and add it again using the new username.
Deleting User Accounts
If the user no longer requires an account, the system administrator should delete it immediately.

To delete an account, make sure the correct group and user names are in the User Administration window and
Click 'Delete User' then click 'OK' when the confirmation window appears.