To edit/create an A360 username in your Autodesk account so that it matches your username in Revit for access to Cloud functionality from within Revit, do the following...
- login into https://360.autodesk.com using your Autodesk account email address and password
- confirm you are logged into A360.Autodesk.com
- select the small figure in the upper right and select Profile in the bubble that opens
- select Security Settings
- select Change Username and enter in just your Revit username (should be your network user name) but not the full email address
- select Save Username
- sign out of your A360 account
- open Revit and sign in to A360 from within Revit using only your new username and Autodesk password
- you should now be able to Render with no errors
- You can now use only the username/password for logging into your Autodesk account