The social network for businesses more than doubles its total funding with CrunchFund among the backers.

CrunchFund, which was set up with a fund with backing from technology company AOL, has helped enterprise social networking company Yammer raise $85m in its fifth round of funding.

The round more than doubled the funding raised in Yammer’s history to $142m. Other backers of the round were DFJ Growth, part of venture capital firm Draper Fisher Jurvetson, which led the round, as well as venture firms Meritech Capital Partners; Capricorn Investment Group, Khosla Ventures, Charles River Ventures, Emergence Capital,…