CC Parameter (Send-SMIMEEmail Cmdlet)
A comma separated list of addresses for carbon copies (optional).
Send-SMIMEEmail -CC string
CC specifies a comma separated list of destinations for carbon copies of the mail message. A copy of the message is sent to each destination, and a Cc SMTP header is created containing the destination addresses. This header is sent to every recipient of the message. If you don't want to copy this information to every recipient, then use blind carbon copies instead (see the description of BCC).