Requirements

Before configuration, make sure that your digital ID (also called digital certificate) is already installed. If the certificate has not been installed, then you need to get a digital ID

Getting started

Open Microsoft Outlook 2007 -> Tools -> Trust Center -> Email Security -> Encrypted Email -> Settings… -> Choose your Personal Certificate (Signing Certificate) -> OK

And then set options like below:

Now you should be able to compose a signed email, in the Options tab

Note: In case you want to send an encrypted email to others, you need to ask the recipients to send you SIGNED emails first; this will help collect and install PUBLIC KEYs (also presented in recipients’ certificates) in your system. After the email is sent, you should see the SIGNATURE (and/or ENCRYPTED) symbol like below in the sent folder: