We’ve all attached files to email. But you can also attach other Outlook items, such as emails and appointments.
This is especially useful when informing someone of the details of an upcoming meeting without including them on the invitee list. It’s also handy for turning over all correspondence with a particular client or on a particular issue without having to forward each one individually. This technique works equally well with contacts, tasks and notes.
Just look for the Attach Item button next to the Attach File button.