Third Party SecIntel Feed - Microsoft Updates

Hello,

Regarding information from the Juniper documentation on SecIntel feeds

https://www.juniper.net/documentation/en_US/release-independent/sky-atp/topics/concept/sky-atp-integrated-feeds.html

Does anyone know of feeds for Microsoft servers or CDNs that are associated with Microsoft products and their associated updates? Alternatively, are there any good repositories that may have feed URLs that can be referenced to try to find a corresponding feed for something that you might need? I can't seem to find any documentation on what kind of "feeds" these are and I haven't been able to turn up anything with searches on third party SecIntel feeds.