All users need to do is to link their Skype account with Alexa.
To start making Skype calls with Alexa, you'll have to enable Skype integration through the "Communications" portion of the Settings menu in your Amazon Alexa app on either iOS or Android. This adds to the users' ease as they can make a call without touching their smartphones.
To that second point, Microsoft has just announced that Skype calling is now available via Alexa, with Amazon's Echo hardware supporting basic Skype calling. Well, it looks like it took the companies two months to bring Skype calling to Alexa devices.
Amazon's new "Wake-on-LAN Controller" feature will let Alexa users power on TVs and other smart home devices that have gone into low-power mode and thus can't be reached via the cloud. Apart from India, Skype calling is also available in Countries like Australia, U.S., U.K., Ireland, Canada, and New Zealand and support for other countries is also rolling out. This means you can give a voice command to your nearest Echo Dot to either make a voice call or a video call if you are using the Echo Spot or Echo Show.
Sign in using the same Microsoft account you use on Skype. At last count, Skype had around 300 million monthly active users - a fairly substantial number.