DOORS NextGen Sandbox: Can't edit or delete artifacts.
3 answers
If this project was created in the sandbox, I would hope he would have permission to edit artifacts by default. If that's not the case Christopher, I would suggest opening a defect against the sandbox.
If you're not familiar with how to do this, go to the My Stuff link at the top of this page. From there you should see a button to "Submit a bug". Submit it for Rational Requirements Composer; then in the Filed Against field, search for sandbox and you should see a sandbox component.