The three options and their availability scenarios are:
Which of the three Outlook email encryption options are available to you depends on who your recipient is and which email account you are using to send encrypted email.
Questions: Which email encryption options are available in your scenario and which one should you choose? How do you set up your selected encryption option and get started sending and receiving secure email? How do you obtain encryption certificates for Outlook, for yourself and your recipients? Which option gives you the Outlook Encrypt button? Did you know that the Microsoft Outlook desktop application offers three methods to encrypt emails, including the latest OME option that does not require installing certificates and lets you send encrypted email to external recipients (such as free web mail users on Gmail, Yahoo! Mail, or any other email account)?
