Looks like the Cortana team is putting the final touches on their Uber integration. Starting today some users, including ourselves, noticed that under Cortana's Notebook > Connected Accounts an option for the call-up car service has appeared. The ability appears only to be for those using Insider releases of Windows 10 and not build 10240. Unfortunately, once you begin the process of linking Cortana to Uber, it appears to fail. This issue is likely due to something on Uber's end as the coordinated effort goes forward.

The option for Connected Uber accounts also appears under Cortana in Windows 10 Mobile. However, it refers you back to the PC for further setup. Best VPN providers 2020: Learn about ExpressVPN, NordVPN & more Microsoft announced their Cortana-Uber integration back in May during Build. From the announcement: "Universal Windows apps integrate with Cortana through the Voice Command Definition extensibility API. When integrating with Cortana, an application can choose to get launched or choose to interact with customers through Cortana's user interface canvas. Immaterial of the actual method an app chooses to integrate with Cortana, she will always preserve and provide all context she has about the specific task at hand."