Patch Manager can go on the WSUS server or on a different Windows server. Many Patch Manager customers install Patch Manager on the WSUS box.
It would probably not be recommended to install it on the Orion box with NPM/SAM, but that non-recommendation is largely based just on the potential performance hit. I am not aware of any inherent port conflicts with Orion-based products that would affect it.
It is a similar thing for installing Patch on WSUS - the biggest deterrent there is the potential performance hit.
In either case - if you are using a remote SQL server to host the Patch Manager db, a lot of that competition for resources is removed.
Two somewhat related caveats:
- Be aware that if you install Patch Manager and choose the "Express Install" option, it WILL install/enable WSUS on that box. If you want to point to an existing WSUS server (whether it is remote or local), use the "Advanced Install" instead.
- SolarWinds Orion and WSUS on the same box are not a good combination. It may be possible to get it to work, but it will likely cause you pain in the interim. So, to follow on from the previous bullet point: I would not run the Express install of Patch Manager on the Orion box if you choose to co-locate Patch and Orion.