Wrong forum. Moving to NPM.
What do you want to do?
Search the mib database for a mib that may be present on your device ?
You need to do an snmp walk using the snmpwalk.exe utility found at \Program Files\SolarWinds\Orion. This saves the list of mibs found to a text file which you can search, if you know the mib you are looking for.
Search NPM database for a specific mib?
You need to use a Universal Device Poller (UnDP) on your NPM server Start > Solarwinds Orion > Network Performance Monitor > Universal Device Poller