...
Double-click the OnBase Unity Client icon
and 
and while you patiently wait for Unity to open, you will see a small icon that looks like this 
appear in the System Tray - the area near the clock, typically in the lower-right corner of the desktop.
Next, you will see an authentication window like the image below (click to enlarge).
Once logged in, you will see the Unity Client. If this is your first time using the Unity Client, it will resemble the following image.
...