Here's my own answer, or maybe it could be considered a slightly-adjusted, alternative solution. Upon further diagnosis, here is what I found:
A) The command
xset worked on both the Hyper-V Manager Connect session and the Xrdp session. Unfortunately, it only allows three mouse movement (not scrolling) parameters: acceleration multiplier, acceleration divider, and pixel threshold for applying the acceleration parameters.
B) Looking further into the X (X11?, Xsession?, Xorg?) settings, there are additional mouse options. The command
xinput worked on the Hyper-V Manager > Connect session but did not work on the Xrdp session. So, it appeared that the Xrdp session somehow did not make use of many (or any) X settings, which apparently help with the graphical user interface in aspects such as the display, keyboard, and pointers (like the mouse).
C) Just now (after-the-fact), scouring my history to find related commands that might be of interest, in addition to
xinput, I found:
xfconf-query. (I expect these will help in a local connection or a Hyper-V Manager > Connect session, not in an Xrdp remote connection.)
D) Reading about how Xrdp and other remote connection programs work, it seems to me that the Xrdp version (v0.6) that I first used might have been using the VNC protocol, which to my understanding does not use X settings. I further found that another package, X11rdp, might make use of more X settings in an Xrdp remote desktop session.
E) Finally, I found a very helpful pair of scripts that helps to download and build packages for debian (which Ubuntu is based upon). The scripts, by www.scarygliders.net, are X11rdp-o-matic.sh and RDPsesconfig.sh. Very helpful documentation is provided at http://scarygliders.net/x11rdp-o-matic-information/ , however, other pages on that site as well as pages on www.xrdp.org and http://sourceforge.net/projects/xrdp/ will likely round out the information you might need. After downloading a repository with
X11rdp-o-matic.sh took quite some time to do its work. At the end of the script, a message stated that X11rdp and Xrdp were installed and were expected to be running. It was also suggested that I might not need to run the RDPsesconfig.sh script, but instead just try to login with a Remote Desktop Connection, which is exactly how it worked out. One thing I wish that I had done is to use the option to install audio sound, but the recommended option to
--justdoit, with the latest stable Xrdp version (
--branch v0.8), really provided all that I currently need.
In conclusion, X11rdp-o-matic.sh helped to download, build, and install the latest stable versions of X11rdp and Xrdp. This configuration provides a way to use Windows Remote Desktop Connection terminal server to connect to a Windows-hosted Hyper-V virtual machine with Ubuntu 14.04 installed. The Xrdp connection is quick and responsive and some of the X settings that I know of (such as some of those listed in C, above) appear to be available in the remote session (thanks to X11rdp). Copy and paste both into and out of the remote session work well. The mouse scrolling issue is resolved; it is fast enough and smooth enough. I might only consider using the option to include audio sound in the future.
MANY THANKS to the authors and contributors to Xrdp, X11rdp, and X11rdp-o-matic!