It carries the build number 10.0.19044.
The first preview was released on July 15, 2021, to Insiders who opted in to Release Preview Channel that failed to meet minimum system requirements for Windows 11.
[3][4] The update began rolling out on November 16, 2021. Notable changes in the November 2021 Update include:[2][5] The update has reached end of service on June 13, 2023 for Home, Pro, Pro Education and Pro for Workstations editions.
[6] The Enterprise, Enterprise multi-session, IoT Enterprise and Education editions have reached end of service on June 11, 2024.
[7] The Enterprise LTSC and IoT Enterprise LTSC editions will reach end of service on January 12, 2027 and January 13, 2032, respectively.