I don't see anywhere in the documentation or on the website on how to setup the SNMP v3. Any help is appreciated!
If you want Orion NPM to use SNMPv3 to monitor the added node, provide the following SNMP Credentials, Authentication, and Privacy/Encryption settings:
More details here http://www.solarwinds.com/NetPerfMon/SolarWinds/OrionAdministratorGuide.1.55.htm
What devices were you trying to set up for SNMPv3?