Install Towbook Agent on your computer by visiting http://towbook.com/download in Google Chrome and then agreeing to everything it asks (EX: install, yes, finish.) then when the second download window opens click "install". Once that's done your computer will open a window to log in to Towbook.
Log into the Towbook Agent using your credentials, click the "Settings" tab, and check the box "Use Towbook Agent as proxy".
When you check that box, a prompt will come up asking them to install a certificate called "Titanium Root Certificate Authority". Click Yes.
A second box may come up asking you to allow the Windows Firewall to allow Towbook. Check the Public Networks box, and then click "Allow Access".
Check the boxes *Open Towbook Agent automatically after you log into your computer*, and *Remember my username and password and log me in automatically.*
Once the agent is installed, to confirm it's working properly, go to D3 and simply *view a call*. When a call gets imported, it will show in the Agent Status window that we created a call, and what call # it created in Towbook (i.e., Created Towbook Call 333638).