Use a password to protect attachments

When sending emails to recipients outside your corporate network, we recommend that you encrypt your file with a password. This allows the recipients to access encrypted files without having Central Device Encryption installed.

Do the following:

  1. Click Protect Attachments on the Outlook ribbon or right-click the files you want to send in Windows Explorer and select Create password protected file.
    Note Protect Attachments is only visible if the email is opened in a separate window.
  2. Follow the on-screen instructions and create a password. We recommend that you use a strong password and don’t send it in the same email as the files. For example, you can give the recipients the password by phone.
    Password restrictions:
    • The password must be at least 8 characters long.
    • The password must not contain more than three characters next to each other in the same keyboard row.
    • The password must not contain three or more consecutive alphanumeric characters.
    • The password must have at least 3 different characters.
    • You need free disk space for the encryption.
    • The maximum supported file size is 50 MB.
    • The encrypted HTML file is bigger than the original files.
    Your file is encrypted and saved as an HTML file. You can now safely attach the HTML file to emails. Recipients can use one of the following browsers to open the password-protected attachment:
    • Mozilla Firefox
    • Google Chrome
    • Microsoft Edge
    • Internet Explorer 11
  3. Instruct your recipients to double-click the file and follow the on-screen instructions to do one of the following:
    • Enter the password and click Enter to access the file.

      The recipients can protect the file with a password when sending it back to you. They may use the same password or create a new password.

    • Click Password protect a new file to protect a different file with a password.