Microsoft today released a new update for the Skype UWP Preview app for Windows 10 users ruing the latest Windows Insider builds. The latest v11.5.155 update for Skype UWP Preview adds support for Call hold/multiple calls, voicemail, translator, directory search improvements, notifications/badging performance improvements and more.
If you are a Windows Insider, check for updates in Store to get this latest Skype UWP Preview update.