MS Remote Desktop - drives not mapping - broken by Sierra update 10.12.2?
It's always got to be worth trying the new v8.2 version, currently in beta. I've been using it myself for quite some time &amp; it's a lot better than the current release v8.0 in many respects.

MS Technet blog: Remote Desktop Client Preview for Mac supports multiple monitors and more

Download: https://rink.hockeyapp.net/apps/5e0c144289a51fca2d3bfa39ce7f2b06/

Highlights - 


  Multiple monitor support
  
  The preview app now supports the ability to use multiple monitors in
  your remote session. You can enable multiple monitors for a desktop
  connection from the additional options.
  
  Copy and Paste files
  
  In addition to supporting copy/paste of text and images, the preview
  app now supports copy/paste of files so that you can transfer files
  into and out of the remote session using both Command X/C/V and CTRL
  X/C/V.
  
  Updates to the keyboard
  
  We’ve changed how the Beta app keyboard works to behave exactly like
  the Remote Desktop client store app. The Beta app initially used a new
  implementation of the keyboard; however, many of you reported that
  this new keyboard introduced several issues with typing into apps like
  the Hyper-v console and typing certain language characters. The Beta
  app will continue to support both Command X/C/V and Ctrl X/C/V to copy
  and paste between the local desktop and remote session. Use the Beta
  app Help->Report an issue option to share your feedback about the
  keyboard. Learn more about how the keyboard works in a remote session.