Microsoft today announced the general availability of Skype for Business. The company promises that organizations currently using Lync 2013 will be updated to Skype for Business and the Lync Online service will be automatically updated to Skype for Business Online.

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http://venturebeat.com/2015/04/14/microsoft-launches-skype-for-business-will-automatically-update-lync-2013-and-lync-online-users