The Azure Connector product is now posted on the support portal. It's currently under ThingWorx Connection Server -> Release 7.4 -> ThingWorx Azure IoT Connector -> Most Recent Datecode -> Datecode: F000 -> ThingWorx-Azure-IoT-Hub-Connector-2-0-0 (37 MB)
The extension is not something I am familiar with. I have asked around and if I get some details I will reply back.
There is no need to use the ThingWorx Edge .NET SDK for this product. The Azure Connector is a server that bridges the ThingWorx platform and Azure. It's specifically useful for when the ThingWorx Edge SDK is not an option or when there is an existing Azure solution you're trying to integrate with. If using the ThingWorx Edge SDK is an option - you might not need Azure.
Hope this helps
This is what one can see on this page: ThingWorx IoT Marketplace with a green button to "Get this Extension"
I can see that the current version is 1.0.0 release date May 1, 2017
I could not find a link you were refereeing to in this post as it can be seen in the image at the bottom.
COMING SEPTEMBER 2017!
The ThingWorx Azure IoT Connector allows devices that use the Azure IoT Hub and Event SDKs to work with the ThingWorx Connection Server and ThingWorx Foundation. This extension supplies an Azure IoT protocol adapter which enables secure connectivity to your Azure tenant.
Once configured, the developer can model Azure IoT data within the ThingWorx Thing Model through Properties, Services, Events and Subscriptions. ThingWorx Edge SDKs are not required for use within Azure to enable this integration.
Release Date: May 1, 2017 Last Updated: May 1, 2017 Current Version: 1.0.0 Software Application Type: Extension Requirements:
ThingWorx 8.0 or greater, Microsoft Azure account