BCC, or blind carbon copy, is a feature in Microsoft Outlook that allows you to send an email to multiple recipients without revealing their email addresses to each other. This can be useful for sending emails to large groups of people, or for sending sensitive information to a select group of people.
To check BCC in Outlook, simply click on the “BCC” button in the email composition window. This will open a field where you can enter the email addresses of the recipients you want to BCC. You can also add or remove recipients from the BCC field by clicking on the “Add” or “Remove” buttons.