This article explains how to add Bcc recipients in Outlook. Instructions apply to Outlook for Microsoft 365, Outlook 2019, Outlook 2016, Outlook 2013, and Outlook 2010.

Recipients added to the Bcc field are not visible to other recipients of the message, even others who are also in the Bcc list.

Open a new email message, reply to a message, or forward it.

In a new message, go to the Options tab. In a reply or forwarded message, go to the Message tab.