Instructions in this article apply to Outlook.com and Outlook Online.

In the new message, selectBccto add the Bcc field to the message header.

Or, selectCcto add the Cc field.

Outlook.com new message screenshot showing where to locate the Cc and Bcc buttons in an Outlook.com new message.

Enter recipients' email addresses in the appropriate carbon copy fields.

The email will be copied or blind copied to those you indicated.

The Outlook.com inbox with New Message button highlighted.

The BCC button highlighted in Outlook.com inbox.

An email message using both BCC and CC in Outlook.com.