Why is the Email Password Reset Link button not working on the Staff record?

When a staff person is matched to a Jackrabbit User ID the Email Password Reset Email button is grayed out. 

Staff that are matched to a User ID and use their Jackrabbit database login and password to log in to the Staff Portal must reset their Jackrabbit User ID if they have forgotten their password. This is done from the Jackrabbit Login page with the I forgot my password link.