I am having a real problem trying to publish my own basemap with high resolution imagery. I have two Federated servers. One is the hosting server and the portal. The other is the imagery server. Both are running 11.5. I have a mosaicked dataset that is high resolution that I would like to place behind my base layers. When I place a group layer of all the images, and publish to the server it works, but the performace is not great, and I cannot get the print widget in the maps to work unless I change basemaps. But when I place the mosaicked dataset behind the base layers and attempt to publish to the hosting server, I get an error the following error:

When I change the server to the image server, I get the following messages:

So the one layer with imagery would not publish to the hosting server, and all the other layers would not publish to the image server.