Email suppression list management and how to

One of our staff admins accidentally attempted to create a Zoom account using an email address that was being setup at the time by someone else. As a result, Zoom attempted to send an email to the address which did not yet exist. The email bounced and Zoom appears to have now added that address to the email suppression list. 

My question is how to get that address removed from the suppression list since that email address it now in use and published. I've looked at Knowledge Base and Chatbot but can find no information. Does anyone have the answer? 

Thanks for your help.