a good starting point might be that:
It is a shame, that the pdfs are not available anymore here, but there is still nice information in there.
And here the PDFs are still available:
Important: All computers need to be in the same network of cause!
It is very helpful, if you have the render-data at a place where every computer can access it. Best is a NAS or another type of network drive. If you do not have something like that, you can still copy the data (A:M files, textures, etc.) over to each computer on the same position like for instance "C:/am_project/my_project.prj".
Important: Do not copy it on your desktop, since the path will vary from computer to computer if the computer user name is different(!).
In general it is pretty easy:
1.) Start RenderServer_64.exe on one of your computers. Make sure it has at least one Core assigned, which is not occupied by a Messenger/Slave. Theoretically it is not necessary, but I think it is the best option.
2.) Now you should read out the IP-address and Port of this computer / the Render Server. You should be able to see that by going to "Tools > Options > Connection".
3.) You can use the other cores of the computer (renderserver) to render too.
4.) Double-Click on RenderMessenger_64.exe in the A:M folder and use the wizard. There your NetRender Server should be automatically set to the IP address you got from step 2. If not, put it in. Same with the port.
5.) On "User defined data" you do not have to put something in, but it is a good idea to write something in that helps you to identify the computer with. That makes it easy to find out, if something is happening with that computer (this is not very hard to guess if you have only 1 or 2 computers in use, but I did it with 12 computers before and than this is really helpful).
6.) If the path of the project files (etc.) is different for the computers (so you could not use a NAS / network drive with the same letter (P:/, etc.) on the computers or you could not copy the files to the same position, the next step can help you. I would try to avoid it, but you can try it out here.
7.) Now start the next computer and install A:M on it. You do not need an own license for that computer or something. After install, just click on "RenderMessenger_64.exe" and follow the Wizard here too. Be sure to put in the right IP and Port of the RenderServer now.
8.) Check the connection of the Rendermessenger. You can see that, in the task bar (next to the clock on Windows). If the icon shows a connection (both "lines are next to eachother without a gab inbetween). If that worked, go back to the Renderserver and have a look. In the lower area of the RenderServer-Window you should now see the other computer-Netrenderslaves and the one of your own computer.
9.) If that is the case, the connection is working and you should be pretty ready to go :).
After that just open Render Messenger on both computers as often as you've got cores (or virtual cores if you use HT/SMT). Only on the Netserver computer leave one to the server.
So if you have a 4 core computer with HyperThreading (HT, Intel) or Simultaneous Multithreading(SMT, AMD) you can use 8 instances on the other computer and 7 on the the server (if the server is a 4 core too).
10.) Now on the Render Server go to "File > New". This will open a new window (Pool1 or something like that).
In that at the top right-click and choose "New Job". A wizard will pop up. Give it a name (this is only for you if you render a couple of different jobs in a row for instance you can see what you do there... for instance "Peter's day out - Walk animation Scene 01 - Take 01" or something like that is a good idea, especially since I leave the jobs in there in general even if they have finished. Browse for the project-file (or chor) on the next button. Be sure, that the path is available on all computers in the same way (or use the option of 6.).
Select which camera and chor in the project you want to use below that.
In general you can leave OpenMP off and GPU is only needed if you use for instance FakeAO/SSAO or something like that. But first I would just try it with an very easy project.
11.) Next put in the render settings you want or use a preset. At the path at "Filename" make sure that the path is available for any computer. You can render to your own c:/ or a net-drive. For the net drive be sure you can access that from any computer. Anything else should be clear. It is mostly the normal render settings you already should know.
12.) After that the new job should be available in the Pool1-Wndows. Now save the job on the server somewhere. (or a net drive... this does not need to be available to other computers)
13.) Now drag and drop the Instances in the lower area of the Window to the lower part of the Pool1 window. After that, the Netmessengers on the computers should start Renderslaves and render the things. You should be able to watch that on the computer displays and you should be able to see that on the REnder Server too. It refreshes every few settings. If something is not working, you should get an information about errors and so on. If you get some, check what it might be on the computer or by having a look at the render server.
Notice: In the Pool1 Window the right mouse button is key. There are a couple of different options there which are really helpful (and pretty straight forward).
I hope I could help a little. If you have any kind of question or problems let us know.
PS: And this might be interesting for a lot of cores too: https://www.patchwork3d.de/start-am-netrender-185-en