Zscaler DLP issue

We configured the content inspection policy for phrase " Confidential" It is working fine on normal websites. but We facing issue when user try to upload in WhatsApp file contain confidential phrases it is not blocked. Any one suggest me to procced further on this case.

I moved this into the root Data Protection category.

To my knowledge, WhatsApp is cert pinned and cannot be inspected, better blocking it quite frankly if you have Data Loss concerns.

WhatsApp is not exactly certificate pinned. Inspection on it can be done and it won’t break the app. I’ve done it with some of my customers. See: Controlling Whatsapp

Whatsapp uses end-to-end encryption and therefore text can’t be extracted for content inspection.