Migration Assistant move from Yosemite to Sierra: keyboard and trackpad behaviour different when using Microsoft Remote Desktop
It might be worth trying the latest RDC 8.2 beta from Technet :Remote Desktop Client Preview for Mac supports multiple monitors and more 

Even though it is still a beta, it offers several significant improvements over the existing release version. I've been using it for months without seeing any real issues.

Key improvements


Multiple monitor support
Copy and Paste files using Cmd or Ctrl C/X/V
Direct connectivity to desktops as well as connectivity through a Remote Desktop Gateway
A new user interface together with a redesigned user accounts experience that includes unified management
High quality video and audio streaming
Import of .rdp files into the app and export of connections as .rdp files
New features like the ability to group desktops and to copy and paste images and files