What happens when a default name is set for a Group Mailbox?

By setting a default name for a Group Mailbox, you can allow users to set a default From name when creating and editing a Group Mailbox and allow the from name to be overwritten from the mail composer window for ad-hoc emails.

If a default name is not set, the system will display the user's First and Last names.

You can set the Default name when adding a New Group Mailbox.