The AppAssure appliance leverages the Windows SNMP service to provide SNMP access to the hardware. To configure the SNMP community name, security, and information, please follow this Windows KB article. The article is written for Server 2003, but still applies to both Server 2008 and 2012.
Once SNMP is configured properly, choose the hardware information that should be available via SNMP, through Open Manage Server Administrator. To do this, open Server administrator and browse to System | Alert Management | SNMP Traps | choose the options desired for each hardware element.