Microsoft recently updated their Remote Desktop Preview app for Windows 10 devices with few improvements. Read the change log below. With the Remote Desktop Preview app, you can connect to remote Windows PCs or resources made available to you by your admin and be productive as if these resources were running locally.
• Added an extension to the on-screen keyboard with additional keys
• Added the ability to pin desktops and remote resources to Start
• Desktop connections are now available in the app’s recent list
• Bug fixes
Update it from Windows Store using the below link.