Running GW 8.0.1

Something one of my clients asked me, and I can't find the solution:

When replying a mail from a user with an attachment, the attachment will be sent back with the mail.

When replying to the same user, but adding CC's, the attachment doesn't appear at those on the CC-list.

One of our secretaries would like to have this a standard action, but every time she has to forward a mail, instead of reply and add CC's.

Anyone know how to solve this?