For security reason edit functionality for Administrator account is not possible unless done by another administrator. Rational behind the reason is user with employee access control permission may accidentally disable the Admin account and thus locking the account, in that case only NS support can reset or create the Admin account – you need call support and go through stringent verification process before NS support resets the account. It is a best practice to have at least one backup admin user along with primary admin user, you never know what if your admin gets run over by the bus one day – you gotta have backup plan.