How do I combine two desktop and one laptop in my network?

Does anyone have instructions for me on how to connect three devices to my network at home so that I can access the other devices and the printer from each device? It also comes.

Here is a guide: https://www.heise.de/...10445.html

However, it is not really necessary to have a Microsoft account, even if the article claims it.

Depending on how old the printer is, it has the network function and can therefore be reached by any device in the network. In the case of PCs, I would allow the devices to access each other in the router settings. If you have a Fritzbox, that's for sure. With a ConnectBox, this will be a little more difficult.