How to change system administrator

Summary: How can we change system administrator for FCCS?

Content (please ensure you mask any confidential information):We recently received an email notification the contact email for the system administrator has left the company and email is no longer valid. We need to change the system administrator from one person to the other. How can we achieve that? I do not see within the application dashboard there is an option to do that. Thank you.

Version (include the version you are using, if applicable): Not sure the version.

Code Snippet (add any code snippets that support your topic, if applicable): We got this email message.