Unfortunately RD Client does not support multiple passwords for multiple machines configured behind a firewall with single IP and multiple ports (another port for each machine).
RD Client allows saving multiple "shortcuts" for each machine/port but inside it remembers only ONE PASSWORD per IP - even with different shortcuts/ports.
In effect you can have only one machine on IP with saved password and for all other machines on this IP (on different ports) you have to input the password manually because RD Client sends always the last saved password for that IP, regardless the port.
Should be corrected.
Greetings for apps developers! :)
lukaszZLegnnicy about Windows App Mobile, v8.1.16