Over the past couple of years, Slack has hogged the spotlight in the team messaging space. Following its achievement of 3.5x user growth in 2015, the three-year-old company raised a total of $540 million in funding, with its last round bringing in $200 million at a $3.8 billion post-money valuation. It’s not surprising that Microsoft, which has been doubling down on productivity apps and services since Satya Nadella was named CEO in 2014, wants a piece of that pie. MSPowerUser reports that the Redmond giant is now working on Skype Teams, a group chat app for businesses that ties in…

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