We've setup ArcGIS Portal 10.5.1 with Integrated Windows Authentication and it works really well, the issue I am running into has to do to Survey123.
When we start Survey123 Connect version 2.5.44 (latest) and configure our Portal, we can select either prompt with External Browser or not, on one computer the SignIn button is completely deactivated (i.e. you can click on it and it does nothing) or it opens a page and hangs.
Has anyone successfully integrated Survey123 with IWA? In theory Esri supports IWA with Survey123.
Anyone have this issue?