This link below is the URL for the community, but it takes you first to the Dassault Systemes’ 3DExperience Platform login screen to get to the community. If you already have a 3DExperience account, use those credentials to log in and it will take you to the community.
Click to Join The Community
Don't have an account yet?
If you do not already have an account, then on the Log In screen for the platform, underneath the blue CONTINUE bar, click on the blue “Create your account” text link to create an account by completing the form, clicking “Register,” and then use your account email and password to log in to the community using the instructions on the screen.