Dear Haident,
Thank you for your suggestion to have a two way synchronization. Although this feature will not be implemented in current version of Outlook Plugin, it will be one of the features we'll review for version 3.0.
1. In Outlook press the "New Mail Message" button
2. Press the Method "Address" button
3. In "Global Method Address List" window enter a name of a contact you want to send an email to and click "Search"
4. Find the contact in the grid, make sure it has an email and then double click on it. You will see it has added this email to the "To" address line
5. Click ok and this client's email will appear in the to address line of your email
6. Type your email and click send
Hope this helps!