Justus Raivo enhanced the CSCfi/csc-user-guide repository by delivering a comprehensive update to multi-factor authentication (MFA) documentation. Focusing on Markdown-based technical writing and documentation, Justus consolidated guidance for MFA activation, usage, and troubleshooting across Haka, Virtu, CSC, and Lifescience credentials. The work clarified how MFA can be assigned to multiple CSC accounts and detailed fallback steps for users when Haka MFA is unavailable, directing them to their home organization for support. Updated visuals and improved formatting increased clarity and onboarding efficiency. This focused, in-depth documentation reduced user support friction and strengthened the security posture for CSC account holders.