Setup forwarding
Direct link: https://admin.google.com/cetusa.org/AdminHome?hl=en&fral=1#AppDetails:service=email&flyout=default_routing (or change domain to main domain in Google account)
Step by Step:
1. Login to Google Admin
2. Go to Apps on main page
3. Click G Suite
4. Click Gmail
5. Click Default routing
Under default routing, do these steps:
1. Click Add Setting
2. Specify recipient - usually will be "Single recipient" and type in the email address you would like to forward
3. Keep Modify message and check on Change envelope recipient under Envelope recipient.
4. Depending if it is outside of the domain (most likely) or not, you can choose to Replace recipient with a new email address or use a username within the existing-domain
5. You can choose to add more recipients - under Also deliver to, check on Add more recipients.
a. Click Add. You can keep Basic, enter the email address, and Save
6. Choose Perform this action on non-recognized and recognized addresses
7. Click Save
You can test it if needed by sending an email and seeing where it ends up using Reports > Email Log Search