Sure, but you can't search for the forum pages on archive.org as far as I'm aware (or at least as easily as searching on Autodesk's website or Google/Bing/etc.) For the time being, old forum posts will likely still show up in search engine search results, and you can take those URLs and look them up on archive.org.
Eventually though they'll likely no longer show up whenever the search engine's crawlers revisit and it's a redirect, in which case the pages are undiscoverable.
Eventually though they'll likely no longer show up whenever the search engine's crawlers revisit and it's a redirect, in which case the pages are undiscoverable.