List of Participants - Microsoft Trusted Root Program
Current List
You can view the complete and up-to-date list here: https://ccadb-public.secure.force.com/microsoft/IncludedCACertificateReportForMSFT.
You can download the complete, most recent list here as a CSV: https://ccadb-public.secure.force.com/microsoft/IncludedCACertificateReportForMSFTCSV.
You can download the complete, most recent list here as a machine readable XML: https://download.microsoft.com/download/9/b/9/9b9c7b91-fcee-4d8c-bf3c-98f4ed8a8452/TRPRelease.xml.
Both of these lists are created from the data in the Common CA Database, of which Microsoft is a partner. More information can be found here: https://www.ccadb.org/.