SMB over QUIC is a new feature that brings the benefits of the QUIC protocol to Server Message Block (SMB). QUIC is a modern transport protocol that offers a number of advantages over TCP, including: Improved performance: QUIC often provides better performance than TCP, especially in situations with high latency or packet loss. Enhanced security: QUIC connections are always encrypted using TLS 1.3. Increased resilience: QUIC connections can tolerate changes in IP address and port during transmission. SMB over QUIC was previously only available in Windows Server Azure Edition, but it is now available in the Standard and Datacenter editions of Windows Server 2025.