How to Add BCC in Outlook Email (All Versions Covered)

BCC — Blind Carbon Copy — is one of those email features that looks simple on the surface but carries real weight in how your messages land. Whether you're sending a company-wide announcement, protecting a mailing list's privacy, or quietly looping in a manager, knowing how to use BCC correctly in Outlook is a practical skill worth getting right.

What BCC Actually Does (and Why It Matters)

When you add someone to the To or CC field, every recipient can see their name and email address. BCC works differently: recipients in the BCC field receive the email, but their identity is hidden from everyone else on the thread — including other BCC recipients.

Three things worth knowing:

• BCC recipients cannot reply-all back to the thread in a way that exposes themselves
• The original To/CC recipients never know BCC contacts received the message
• BCC is not encryption — it's a visibility control, not a security layer

This makes BCC especially useful for mass emails, forwarding sensitive conversations, or keeping a paper trail without creating awkward reply-all chains.

How to Add BCC in Outlook on Windows (Desktop App)

The BCC field is hidden by default in Outlook's compose window — Microsoft tucks it away to keep the interface clean. Here's how to reveal it:

1. Open Outlook and click New Email to start a new message
2. In the compose window, go to the Options tab in the ribbon at the top
3. Click BCC in the "Show Fields" group

The BCC field will now appear below the CC field in your message header. Type your recipient's name or email address directly into it, just as you would with To or CC.

Important: Once you add BCC to one email, it stays visible for all future messages in that session. If you close and reopen Outlook, you may need to re-enable it.

Keyboard Shortcut Option

There's no direct keyboard shortcut to toggle BCC, but once you're in the compose window, you can press Alt + B on some versions to jump focus to the BCC field if it's already visible.

How to Add BCC in Outlook on Mac

The process is slightly different on Outlook for Mac:

1. Open a new email compose window
2. Click Options in the toolbar at the top of the message
3. Select Bcc Field from the dropdown

Alternatively, go to View > Bcc Field from the menu bar while a compose window is active. The BCC field will appear and remain visible for subsequent messages in that session.

How to Add BCC in Outlook Web App (OWA) 📧

If you're using Outlook through a browser at outlook.com or outlook.office.com:

1. Click New message to open the compose pane
2. In the compose window, look for the BCC link — it typically appears to the right of the To field or below it
3. Click BCC and the field expands inline

The web app makes BCC slightly more visible than the desktop version, which is useful if you're new to the feature.

How to Add BCC in Outlook Mobile (iOS and Android)

On the Outlook mobile app, the BCC option is tucked into the compose header:

1. Tap the compose button to start a new message
2. Tap the small arrow or chevron next to the To field — this expands the full address header
3. The CC and BCC fields will appear below To

Tap into the BCC field and type your recipient's address. Mobile autocomplete will pull from your contacts, just like the desktop version.

Key Differences Across Outlook Versions

The core behavior of BCC is identical across all versions — the differences are purely about where the toggle lives in each interface.

Common BCC Mistakes to Avoid

Don't BCC when you mean to forward. If someone needs to respond or be part of the conversation, BCC isn't the right tool — they're locked out of any reply chain.

Don't assume BCC guarantees privacy. If a BCC recipient accidentally replies to the thread from a forwarded copy, or if email servers log all recipients, the "blind" element can break down in enterprise environments.

Don't use BCC to secretly monitor employees without disclosure — in many jurisdictions and company policies, this carries legal and ethical implications worth checking before acting on.

Why the BCC Field Is Hidden by Default 🔍

Microsoft made a deliberate design choice to hide BCC on first use. The reasoning is that most everyday emails don't need it, and a cluttered compose window creates friction for casual users. Power users who need it regularly can pin it visible — though notably, Outlook doesn't offer a persistent "always show BCC" setting in the traditional desktop app without it resetting per session on some builds.

This default-hidden behavior catches people off guard, especially users migrating from Gmail, where BCC is similarly hidden but surfaced through a slightly more prominent link in the compose window.

What Changes Depending on Your Setup

How smoothly BCC works for you depends on a few variables that aren't always obvious:

• Your Outlook version — Microsoft 365 subscribers get the most current interface; older perpetual licenses (like Office 2016 or 2019) may have slightly different menu layouts
• Admin settings in enterprise accounts — IT departments can restrict or customize Outlook's interface, which occasionally affects which options surface in the ribbon
• Whether you're using Cached Exchange Mode — in some corporate setups, address resolution in BCC may behave differently depending on your network connection
• Mobile OS version — the Outlook app on older iOS or Android builds may present the compose interface differently than current screenshots suggest

These aren't dealbreakers, but they do mean the exact steps above may need slight adjustment depending on the specific environment you're working in.