This behavior by Microsoft is very normal. The latest version available is 7.40.0.140 or 7.40.0.151 when installing on a Windows 7 or newer versions.
They will be disabled by default and you will not be able to connect using these versions. Microsoft announced that it will be discontinuing versions older than 7.3.1. If the number of incidents reported is high, it probably means there is a problem in the Skype servers. For this, you can try checking the status using third party websites which list down all the reported incidents. Sometimes the official website doesn’t list all the outrages in the network. If they are not, there is nothing you can do except wait until the servers are up again and acting normal as expected. Make sure that Skype services are normal. All the resolved problems are listed here with the time stamp and the date. If you navigate to the end of the page, you will see a heading “ Resolved Incidents”. As you can see as an example, Skype is not facing any problems in its service You can easily check if Skype servers are online by checking the Official Skype Status webpage. Like we explained above, there are times where Skype servers are down because of either maintenance or when they are a target of a DDOS (Distributed Denial of Service) attack. Start with the first one and work your way down accordingly. We have listed down a number of different solutions for you to try. The causes of this error are very widespread and may occur due to both reasons either there is a problem from the server side or the problem resides at your end. Despite being a giant in the computer to computer communication, this error message is quite old and occurs every now and then. Skype is a telecommunication software which allows people to video call and chat with anyone around the world. Many users who use Skype’s desktop application face an error where the application refuses to connect to Skype servers even if you are connected to the internet.