How do I “blind copy” someone on an email in Outlook?

Lora: How do I “blind copy” someone on an email in Outlook?
I am handling a friends RSVPs for an event. They want me to “blind copy” them rather than “open copy” so that the guest are dealing with me, but they still get a copy so they can keep a tally for catering etc.

Basically they don’t want the cc to show at all. Can someone please tell me how to do this?

Answers and Views:

Answer by Hanyuu
Put their address in the BCC field (as opposed to the TO or CC field.).