Microsoft Lync was renamed Skype for Business, and now it's rolling out as part of the April update for Office 2013.

I do hope it doesn't make a mess of my settings when it does update.

...today, we’re thrilled to announce that the new Skype for Business client is now rolling out as part of the April monthly update for Office 2013! In addition, Skype for Business Online is now rolling out to Office 365 customers worldwide, and we expect the roll out to be complete by the end of May. Microsoft Rolls Out Skype For Business [blogs.office.com]

Microsoft rebrands Lync as 'Skype for Business' [webmasterworld.com]