I'm trying to figure this out also. Following along with the suggestion I added a new portal (via the "not signed in" icon in the upper right of the main window, "manage portals") to accommodate our organizational login. For us, the login is simply https://organization.maps.arcgis.com. I was able to add the portal, but once I get to this point I get stuck again as we use IDP/single sign-on with our organization credentials. Any thoughts on that? I can use my full organizational username instead of my organizational one, but at that point there is no password associated with it. Thanks.
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