Are there any license/terms of use issues with creating web maps and app in ArcGIS online with secure ArcGIS server services and then sharing the web map and app publicly to give only colleagues that do not have a ArcGIS online account access to the maps and apps? We have both ArcGIS server and a ArcGIS online organizational account if that matters in this process. Any feedback on this would be helpful.
Thanks
Dan
If on the AGOL side you leave them as "public" but have them served from secured AGS services, I don't think there would be a licensing issue. That is how I plan to do it. But you need to have your AGS server set up as https/SSL and have a proxy and/or have the user log in to access the data.
This is in theory for me, since I haven't gone thru this process completely, but there are many discussions here, and a new page that might help
Trust | ArcGIS
I have many of these other links under my "pinned" section, and rather than include them here again...
Web AppBuilder Developer Edition - Resource List (updated 5/13/2018)