Unify Square, a US-based software developer for professional conference call service Skype for Business, closed a series B round featuring Stanford University at $12.2m.

Computing company Microsoft and Bridge Bank as well as a range of angel investors also contributed to the extension.

Unify Sqyare closed the first tranche of the round at $8.2m in February this year, securing funding from Microsoft, Unify Square chairman Geoff Baldwin and several angel investors.

Unify Square markets tools for Microsoft Lync, which is…