The workplace messaging service has accused Microsoft of the "illegal and anti-competitive practice of abusing its market dominance".
The company said that it had seen "significant cyber activity" from a group of hackers that it believes "originates from Iran and is linked to the Iranian government."
Microsoft founder and philanthropist Bill Gates spoke about funding for global healthcare at the World Economic Forum.
Microsoft co-founder Paul Allen has died of cancer aged 65
Spanish artists Concha García Zaera, an 88-year-old grandmother from Valencia has become an Instagram sensation.
Microsoft claims it has blocked cyber-attacks by Russian groups who the company says have links to the Kremlin and military
What could billionaire Microsoft co-founder Bill Gates possibly regret? Well, a keyboard shortcut, it turns out.
Dubai has a microsoft designed font for self expression
According to the latest Bloomberg Billionaire's Index, Bill Gates is now worth $90 billion, putting him well clear of the second wealthiest individual Inditex founder Amancio Ortega.
Researchers are testing a smart mosquito trap they hope will help better track the spread of the Zika virus.
Microsoft is in the weed trade after the company entered a joint partnership with KIND Financial a seed-to-sale software provider that helps state and local governments track the cannabis business, ac
Microsoft has showcased its new Xbox One S, due to roll out in August.
Microscope has done a deal to buy LinkedIn Corp for $26.
Europe will have faster internet speeds by the end of 2017.
It's the end of an era for video gamers as the Xbox 360 console is being killed off by maker Microsoft after 11 years.
The US Department of Justice has yet to respond to the filing of the lawsuit
In Business Line we examine the tensions within EDF over its plan to build a nuclear power station in the UK, and why Microsoft is reaching out to long-time rival Linux, the Penguin people.