Software Version: Revit 2009 is a legacy version of the BIM (Building Information Modeling) software, released in 2008. As this software version is over a decade old, standard support has been discontinued by Autodesk.
Activation Protocol:
Due to the age of Revit 2009:
To understand the request, one must understand the 2009 activation workflow: Software Version: Revit 2009 is a legacy version