TL;DR: 2023 年 3 月开始推送，9 月推送完成，2024 年 3 月移除原有 PDF 引擎；现有 Acrobat 订户可使用高级功能，原有免费功能继续保持免费，界面右下角有个商标（如图）
Adobe and Microsoft Bring Industry-Leading Acrobat PDF Experience to 1.4 Billion Windows Users through Microsoft Edge
https://blogs.windows.com/msedgedev/2023/02/08/adobe-acrobat-microsoft-edge-pdf/
Microsoft Edge and Adobe partner to improve the PDF experience
https://techcommunity.microsoft.com/t5/microsoft-edge-insider/microsoft-edge-and-adobe-partner-to-improve-the-pdf-experience/ba-p/3733481
Behind the Scenes: How we are securing our new PDF stack
https://microsoftedge.github.io/edgevr/posts/How-we-are-securing-our-new-PDF-stack/
