We have AGOL for Organizations. When I am in item details and I choose the option to open a feature layer in ArcGIS for Desktop it appears to work (goes through file handler), but nothing shows up in ArcMap. I then tried another workflow, to start from Desktop, add the layer from ArcGIS Online. I can find the item and click "Add" but again nothing shows up. There is no error, just nothing to see.
I know this has worked fine in the past. I have tried a few layers to ensure that it wasn't something with that particular layer. In case it matters, we are now using Enterprise logins, but I have tried this using my AD account and a non AD admin account with the same result.