anybody else experience this issue, I did the following
but when I attempt to federate I get this issue.
managed to do it using the mydomain.com/7443/arcgis/portaladmin
Have you deleted the older version of ArcGIS Web Adaptor, and installed the new version of web adaptor with the same name?
Also let me know if the previous version of Server was federated with Portal. If yes, it is not recommended to un-federate the Server before upgrade.
Yes I have deleted the older version (10.3).
Yes the previous version of Server was federated with Portal.
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