How to Sign and Encrypt Email in Outlook

After successfully configuring your S/MIME certificate in Outlook, you can start sending Signed and Encrypted email. While we recommend that you let your mail server administrator handle S/MIME settings, here’s how you can do it yourself:

Outlook Desktop Client:

1. Compose a New Email.
2. Navigate to Options at the top.
3. Click the Sign button.
4. Compose and Send your email.

Outlook Web Browser:

1. Create a New Mail.
2. Click the three-dots menu (…) and choose More Options.
3. Select the checkbox for “Digitally sign this message (S/MIME)”.
4. Compose and Send your email.

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