As of this week, Autodesk subscription and maintenance customers now have five releases back up from the prior policy of 3 prior versions.
“We’ve heard your feedback that you need more than three previous versions for long-term projects. So, starting November 2, 2020, Autodesk is expanding version access for all customers (on subscription and maintenance plans) for the latest release and up to 5 versions back. This makes it easier for teams to collaborate on the same version throughout a project.”