You can Skype with up to 50 people at once — here's how it works

You can Skype with up to 50 people at once on your Mac or PC in a Skype group video or audio conference.

How to set up two-factor authentication on Skype, and increase the security of all your Microsoft accounts

You can enable Skype two-factor authentication by turning the security feature on in your Microsoft Account settings.
Computerworld

Skype opens up SIP business service to everyone

Any business that has a corporate VoIP system can now use Skype’s SIP trunking service as a way to cut the cost of corporate phone bills. The Skype for SIP program goes into general beta testing today ...