I've seen this problem reported a few times for example this Ask Ubuntu question: Xrdp login failed but none of the questions had answers which worked for me - so I am raising a new post to try and get help with this. I think the difference between the other questions and mine is that I am on a company network and I am using a company-wide login. So the logon (userid/password) for my Windows desktop is the same as for my Ubuntu desktop.
I am trying to connect to my Ubuntu v16.04 Desktop from a Windows7 desktop using Windows Remote Desktop (RDP) but I get the error,
xrdp_mm_process_login_response:login failed
I am able to connect to the Ubuntu desktop from my Windows machine using Putty/openssh and also via a VNCViewer...but I would like to be able to use Windows RDP.
I have installed the xrdp software on Ubuntu but as shown in the screenshot there is an issue authenticating myself via the "SesmanXvnc" login screen.
I assume that my login credentials are picked up from our company network but I don't know how this works exactly in Ubuntu. I use the same credentials with Ubuntu as I use to log into Windows.
Based on the screenshots provided, you are using the xrdp version 0.6.x this error can occur when password provided is incorrect.
Just an idea
By default, the xrdp login screen provided in the screenshot will use en-us keyboard layout. Can you ensure that the password provided is correct based on your keyboard layout ? Type your password on the user name text box and check that the keyboard layout is not the problem...
Hope this help Till next time See ya