We have Skype 2016 Basic Edition installed on all end user machines, I need to uninstall the same to roll out Office 365 client. If you want to do a clean Skype uninstallation in a short time, Mac Cleaner can be your better choice. To be clear, this isn't Skype I'm talking about, but Skype for Business.
For me Skype for business is of no use and I needed the former Skype be able to use call note. By default, they should be located in the system. It’s a default Apple application that you will find in Applications → Utilities. Exit Skype For Business on Mac if it's running Drag the Skype For Business on Mac application to the Trash Remove the existing Skype preferences if these hidden files exist. Here you will find all files associated with leftovers.
First, you will need to quit Skype by control-clicking Skype, then selecting Quit Skype. In Skype for Business, select the tools icon and navigate to Tools > Options. To cleanly uninstall Skype of Business on Mac, follow these steps: Log on to your computer by using administrative credentials. A notification pops up with the following messages: “Are you sure to delete selected files?” Click “Confirm” to move on. Type the following commands in the Terminal window.
If Office installation fails, see What to try if you can't install or activate Office for Mac.