Within 60 days of an email account being deleted, it can be restored by an administrator with the "email accounts" privilege. To do so, visit the "Email accounts" section in the Admin Portal and click the "Restore deleted accounts" button.
On the next page, find the email account you wish to restore and click the arrow icon under the "Restore" column.
Note: To access a restored email account again, you'll need to reset its password via the Admin Portal.