I have Portal for ArcGIS working well at two locations. The biggest issue is that users get a print error when accessing an image service from an outside agency. I have attached a image of the error message.
If the background image is changes, printing seems to work fine. Both instances of Portal experience the same thing.
I have communicate with the agency, but have not found a solution - other than use a different service, which I would rather not do.
thanks
James Armstrong