This article explains the official document of Juniper which user can refer for CASB Deployment.

We recommend using the following doc for CASB deployment in Secure Edge -

• Secure Edge Solution CASB configuration you can refer this documentation: CASB Overview | SD Cloud | Juniper Networks

• https://www.juniper.net/documentation/us/en/software/secure-edge/administration-guide/casb-dlp-admin-guide.pdf is for API mode CASB-DLP, which is an “OEM” of Lookout’s CASB-DLP integration with Juniper.
  • That offering (API mode CASB-DLP) complements our Juniper's inline CASB (no DLP) feature.