To add a new Admin email to your platform you must create first a new end user account so we can validate it to have the access to Admin functions.
In order to create a new user, you have to go to Manage > Users > Create a new user:
Once the new user is created, please, contact us at firstname.lastname@example.org and we will activate the account as Admin.
Please, note that Admin email is never used in automatic emails sent to users. It is only for direct contact between the SonoSuite team and the admin as well as having more visibility in the platform.
Here is more information about Setting up system e-mail addresses.