The MIB database is updated on the SW Customer Portal very frequently -- at least one a month, I think. As for how to update the MIBs on your Orion servers, please read below:
- Login onto the SW Customer Portal (https://customerportal.solarwinds.com/home)
- Once you have logged you will find the link for the Orion MIB database under the Helpful Links menu option
- Download the MIBs.zip file to a temporary folder and extract it
- Shut down all SW services on the core server
- On the core server, go to C:\Program Data\SolarWinds<-- For this to work, you should modify the Folders and searchoptions for the servers' C: drive so you can see hidden folders
- Rename the MIBs.cfg file to something else (i.e. MIBs_old.cfg)
- Copy the MIBs.cfg from the downloaded zip file to the C:\Program Data\SolarWinds folder.
- Restart SW services on the core server
- Repeat steps 4 - 8 on all your additional Polling Engine servers
Best wishes.