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Send more encrypted emails in Outlook using the Outlook add-in. The Outlook add-in is software that embeds to Outlook and allows emails to be sent encrypted by user control and automation. Read more ahead.

Note: You must integrate your PreVeil email with Outlook before installing the add-in. If you install the add-in before doing the integration, the add-in will not work properly. To integrate your PreVeil mail with Outlook, use the steps found here: Add and use PreVeil in Outlook on Windows.

Table of Contents

Installation Instructions

  1. Before installing the PreVeil Outlook Add-in, make sure that Outlook is closed.

  2. Download the Auto-Encrypt Add-in to your computer by going to preveil.com/download and double-click to run the installer.
    Note: the download link is set for PC users

  3. Click on the ‘Next’ button on PreVeilNewOutlookAddin Setup

  4. Click on Install to install the add-in to your Programs folder

  5. The next time Outlook is opened banners will appear across mail messages. Mail encrypted by PreVeil (in your PreVeil mailbox) will show the Message Encrypted while others will show message not encrypted.
    When drafting a new email message, when encryption mode is turned on the message will be encrypted and sent over PreVeil. When the encryption mode is off it is not sent using PreVeil’s encryption or service. The encryption mode is toggled by a control in the composition window.


  6. When composing a message directly from your encrypted account in Outlook, the same banner will appear across the top of your email (fig. e). The message will now be sent encrypted through PreVeil.
    If you add the address of a non-PreVeil member, the bar will return to the gray bar. To ensure the individual gets invited to join PreVeil and is able to read the encrypted message, simply click the “Turn On Encryption” button on the upper left. (fig. f)

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The key words are the following.

  1. CUI

  2. ITAR

  3. ConfidentialCONFIDENTIAL

  4. EncryptENCRYPT

  5. SensitiveSENSITIVE

  6. FOUO

  7. SecureSECURE

  8. FCI

Editing the key words

The behavior of the keyword encryption is set up by the keyword file (outlook-keywords-settings.json), which is installed once and is never updated. A default keyword configuration file is installed on the system if a previous file does not exist. The location of that file is “C:\ProgramData\Preveil\PreVeilNewOutlookAddin.”

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