Have you entered the URL to your organization? It is not the default www.arcgis.com URL. You need to "Manage Portal Connections."
Run the ArcGIS Administrator App from the start menu. Click the Advanced button. Click Manage Portal Connections and enter the URL to your organization.
If you don't see this workflow, you are running an older beta version of desktop (which I don't have). As I recall the Manage Portal Connections option was on the ArcGIS Online Sign In box in ArcMap. Look for a Manage Portal Connections link, I believe.
it´s strange. I´m using an "older" Version of ArcGIS Destop. 10 SP4. I see the "Manage Portal Connection" in ArcMap. After I entered the URL to my company (https://[company].maps.arcgis.com) I still couldn´t log in with my "orignial" User. I created another User in AGO. With this user I´m able to log in. With this user I don´t even need the URL of my company...
But after all... There is no way to upload directly from ArcMap to AGO? Or will this feature be available in 10.1 ?
In order to use ArcGIS Online beta, you need ArcGIS Desktop Beta 10.1 (or final release, which is shipping soon, or shipped already). Publishing services from desktop is available at 10.1.
Will I be able to publish maps from ArcMap 10.1 to ArcGIS Online, without ArcGIS Server? I'm using ArcGIS Advanced 10.1 right now, but I don't see the option publish to ArcGIS Online. Maybe this is because we don't yet have an ArcGIS Online trial subscription?