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  1. Set up Outlook to use S/MIME encryption - Microsoft Support

    Want to add a padlock to your email messages? You can use encryption and digital signatures in new Outlook, classic Outlook, and Outlook on the web for work or school accounts to increase the …

  2. Send S/MIME or Microsoft Purview encrypted emails in Outlook

    Send S/MIME or Microsoft Purview encrypted emails in Outlook using a work or school account with a qualified Microsoft 365 subscription.

  3. Send encrypted messages with a Microsoft 365 personal or family ...

    Here's what you need to know about encrypted messages using your Microsoft 365 personal or family subscription. Discover how to encrypt an email in Outlook, send an encrypted email, and read an …

  4. Learn about securing and protecting email messages in Outlook

    Encrypting an email message means it's converted from readable plain text into scrambled cipher text. Only the intended recipient can decipher the message for reading. Any recipient without the …

  5. Open encrypted and protected messages - Microsoft Support

    Learn how to identify and open encrypted and protected emails no matter what email client you're using.

  6. How To Encrypt a File or Folder - Microsoft Support

    Learn how to encrypt a file or folder in Windows.

  7. Secure messages with a digital ID in Outlook - Microsoft Support

    To send and receive encrypted email messages, both the sender and the receiver must share their digital ID certificates with each other. Open a message that is digitally signed as indicated in the …

  8. Send a digitally signed or encrypted message for Mac

    Select the account that you want to send an encrypted message from, and select Advanced > Security. In Certificate, select the certificate that you want to use.

  9. Troubleshoot Office 365 message encryption - Microsoft Support

    Have you received an encrypted message you can't open? Are you unable to add permissions to a message you want to send? Select your issue below for troubleshooting instructions. If you're …

  10. BitLocker Drive Encryption - Microsoft Support

    To enable encryption, select the option Turn on BitLocker . The drive will begin the encryption process. This can take some time to complete, but you can continue to use your device while it progresses. …

  11. Classic Outlook recipients are unable to open "Encrypt Only" emails

    6 days ago · To prevent the issue, select the Options ribbon, then select Encrypt, and choose Encrypt or Do Not Forward as noted in this article, Send encrypted messages with a Microsoft 365 personal or …