Why did the network printer stop printing via RDP after replacing the router?

Question

Windows

The printer is visible, and responds, and prints. But due to the change of provider, we installed a microtik router. Now the network printer is not visible when you log in via remote desktop.
That is what I mean - the printer is on the network, responds, and prints great. If you go to another computer in this LAN via RDP, then the printer does not appear in the list of printers. To be honest, I don’t even know what question to drive into Yandex. Maybe someone knows how to ask such a question?
When it was not microtik, everything worked.
If it's important: RDP port is not standard. Changed to 8699.

Answer 1

The problem was solved by opening ports in the firewall of Doctor Web. The most interesting thing is that Doctor Web has been standing there for a long time. Maybe a glitch with the update has arrived, or maybe the accountant is keeping something back. We will never know the truth.

Answer 2

In a peer-to-peer network, the router does not participate in the transmission from the word at all. Is the switch still the same? Is there a ping from the Terminal to the printer? Yes, update it as localhost with TCP\IP port.