A G Suite platform let you set also other settings, which can’t be set from the admin console. For these settings an API call is used.
At first we mention a dito gam that is very popular among the admins. It lets you to enter commands from a command line, eg. the following one will enable to establish the signatures of all employees in the company:
gam all users show signature
Similarly you can simply use the administrative rights to manage end users, without you know their passwords - eg. setting the signatures, setting a delegated mailbox, redirect emails and also supports highly desirable operations. If you want to know more informations, you found them in a Help for that product.
You can achieve everything that the gam allows by using the appscript and automated activities of applications on Google Drive.
We can offer you a training for the appscript where we show you the properties of this tool. If you are interested in training, please contact us via the email address email@example.com