Hello Mark,
No, currently Esri is not providing customers with a standalone executable (.EXE) or MSI Installer for Collector for ArcGIS for Windows 10 devices. For customers asking about support outside the Windows 10 Store, Microsoft offers a mechanism through the Windows Store for Business whereby IT departments can get the binaries and deploy them using their own methods (MDMs, etc.), without the client machines having access to the Windows Store.
The request for Collector for ArcGIS for Windows 10 device standalone executable (.EXE) or MSI Installer has been logged as ENH-000095353. Please contact Esri Support and submit a Support Case asking to be attached to ENH-000095353; please include how your organization currently deploys Windows apps to devices (particularly Windows Store apps if you are already deploying them). Are you using a deployment tool, MDM, etc.? If so, which ones?
Collector Team has successfully configured Windows Store for Business and Azure to deploy our ArcGIS Apps (including Collector for ArcGIS) to Windows 10 machines. However, Esri Support doesn't provide support for Windows Store for Business nor do we support workflows related to specific MDM, SCCMs or other Windows 10 Apps deployment methods.
https://technet.microsoft.com/en-us/itpro/windows/manage/windows-store-for-business-overview
https://technet.microsoft.com/en-us/windows/store-for-business.aspx
https://blogs.windows.com/buildingapps/2015/11/16/increase-your-apps-reach-with-windows-store-for-bu...
Regards,
Denise
Denise King | Technical Lead - Apps/Mobile
Esri Support Services