Thanks Omer, This resolved the issue for me. In v10.6, once I connected to the federated portal via ArcGIS Administrator I could publish to ArcGIS Server and also make administrative & publisher connections to the server. Esri just need to update this documentation http://enterprise.arcgis.com/en/server/latest/administer/windows/about-connecting-to-arcgis-server-in-arcgis-for-desktop.htm to include this information... Haydn
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