Setting Up CUNY MFA CUNY now requires multi-factor authentication (MFA) for CUNY Login to improve security. This extra step helps protect your personal information and CUNY’s data from cyber threats, ensuring secure access to CUNY systems like CUNYfirst, CUNYBuy, Brightspace, and Blackboard. Note: This MFA is separate from the one used for Microsoft 365 (M365).