You can avoid the need to enter information into the 'required' fields each time you use the Username Generator by populating these fields for the new notification type- even if you don't intend to use it.
This can be completed under Enrollment Management > Communication > Notification > Username Generator.
Steps to Duplicate
When using Enrollment Management > Admissions > Admissions Management > Overview > Username Generator: In the final step (header: Step 4 of 4), you have options to 'Save' or 'Save and Send' an E-mail. If you click 'Save' (don't send email), the system will ask you to populate the required fields: 'Reply E-mail', 'From Name', and 'Body' before proceeding.