Testers have been putting the new version of the Lync 2013 desktop client and Lync Server 2013 through their paces for a few months.

But there's another Lync product in the family -- an Lync app built specifically for Windows 8 and Windows RT. This is the product to which Microsoft officials previously referred as Lync 2013 MX. This touch-centric, Metrofied ("Windows Storized"?) version of Lync was not released as part of the Office 2013 Customer Preview in July.

But there's now word that this new Lync application will be available in the Windows Store for both Windows 8 and Windows RT as of late October. That's according to a September 20 post on the Lync Team Blog.

Read more at source:
Microsoft to deliver new Windows 8 and Windows RT Lync app in late October | ZDNet