Tracking quantity of IM traffic through Sonicwall Viewpoint

I am curious if there is a way to log or show a report of the quantity of IM traffic from specific IP addresses with Sonicwall or Viewpoint?
I have gone into the log in Sonicwall Administration and that appears to go back for an hour or two of the current day and shows IM traffic going and receiving by IP.  I would like to be able to do a more lengthy report by entire day/month for an IP to see just how big of a problem it is.
Does it log this by default or how can I set it up to log the quantities by default?  I don't see anything in Viewpoint that shows the IM traffic.
We have a Model: NSA 2400, Firmware Version: SonicOS Enhanced 5.5.2.0-3o    with the following:
Service Name Status  
Nodes/Users Licensed - Unlimited Nodes    
SSLVPN Nodes/Users Licensed 2 Nodes (0 in use)  
VPN Licensed  
Global VPN Client Licensed - 20 Licenses (0 in use)  
CFS (Content Filter) Not Licensed  
 Client AV Enforcement Not Licensed  
Gateway Anti-Virus Licensed  
Anti-Spyware Licensed  
Intrusion Prevention Licensed  
Application Firewall Licensed  
Anti-Spam Not Licensed  
ViewPoint Licensed