This option is most commonly used by accountants or bookkeepers that would like to manage their clients' accounts. Alternatively, administrators or expense-approvers from multi-user accounts can also add other employees' accounts.
That allows them to submit items on other peoples' behalf.
1.Find the People icon in the top right of your screen.
2.Click to add or create an account and then fill in the login details of your clients.
3.You can now switch between accounts!