The Account Administrator role is different to other roles. As was mentioned earlier, this role is created and automatically assigned to the first staff member of any newly created account.
The Account Administrator role is defined by user for types of accounts they can create and provides the new account staff member with all the privileges applicable to this type of account. Its purpose is to immediately enable the first created staff member to perform all required functions, such as setting up other staff members and so on.
Note: Staff members later created for the account are not assigned the Account Administrator role automatically.