Two of the big-four voice-based, AI-augmented, digital assistants have announced a tie-up this week, with Microsoft and Amazon announcing that they have partnered to integrate Cortana and Alexa. The goal is to provide better access to each platform’s unique features, and looks like an attempt to bridge the gap from the home (Alexa) and the workplace (Cortana). Microsoft has a presence in the vast majority of enterprises, which use its Office suite and Outlook email platform in their everyday operations – although Google and its software suite are doing their best to scratch out some market share from Office. With the Alexa integration, Microsoft would be able to open up all of the rich data from that professional environment, and…