@deagle311 

If RDP works in AP Mode then your port forwarding rules reflect the LAN IP of your modem/router. You need to change them to point to the IP that the Deco gets from the modem/router. You would then log into the Deco and see what LAN IP it gave the computer that you are going to RDP into and do port forwarding for that as well (https://www.tp-link.com/us/support/faq/1797/). So you are essentially doing double port forwarding, the modem/router forwarding the ports for the IP it gave the Deco, and forwarding the ports for the computer's IP that the Deco gave it.