We create additional accounts in the Users section.
Click on "Add" and then enter (at minimum) a user name and password.
Click "Continue". On the resulting page, we click on "No System Command Policy"...
Then bind the command policy to the user:
When finished, click on "Done". Now we have a second user (with "sysadmin" rights):
Note: yes, clicking on OK allowed be to make the changes (but always remember to click the floppy icon to save the running configuration):
On the other hand, the new user could not even view the list of users:
We would have to grant that user the "superuser" command policy. Although the term "admin" (sysadmin) might imply more authority than "user" (and even "superuser") the sysadmin has limited rights in some sections of the NetScaler, while "superuser" is on par with the nsroot account.
Configuring Users, User Groups, and Command Policies