Can Online Resource settings be modified later?
Yes. If you want to change the state of online resources after a product is installed, you can do that from the CAD Manager Control utility. The CAD Manager Control utility is installed separately from AutoCAD.
From the Installation wizard, select Install Tools and Utilities
and then select the CAD Manager Control utility. After installation
is complete, you can start the utility from the Start menu
(Windows). Click All Programs (or Programs) 
Autodesk
CAD Manager Tools CAD Manager Control Utility.