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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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When editing an email from a PreVeil account, and a CUI keyword is input to the subject line, the encryption mode will automatically turn on. The CUI word or acronym is case sensitive and the mode is turned on as the user clicks off the subject line. To apply auto-encryption via a keyword:

• Keywords must be entered in the subject line of an email entirely in upper case.

• There must be a word boundary for each keyword. For instance, if they keyword is “CUI”, a space between any other words in the subject field is required; the following sequences will not cause a switch to encrypted mode

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• :

  • HelloCUI out there

  • Hello CUIout there

  • HelloCUIout there

• After entering a keyword into the subject line of an email, you must tab out of the subject field for the auto-encrypt to initiate.

What are the key words?

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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The keyword file is a JSON file that contains a list of keywords (example follows). Each keyword is case-insensitive. The add-in will convert each keyword to uppercase. So, no matter what case is in the file, the add-in will convert the keyword to uppercase.

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Please note that when editing the JSON file, case sensitivity is not required: additional keywords can be added in upper or lower case, or a mix of both. However, when entering keywords into the subject line of an email, they must be entered entirely in upper case to trigger the auto-encryption.

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After making changes and saving, restart the desktop Outlook application.

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