Most organizations should be at least as worried about user management as they are about Bond villain-type hackers launching compromises from abroad. Many tools offer end-to-end encryption (e2ee), which is a boon when viewed through the lens of protecting against outside attackers. However, e2ee also resists internal governance and compliance programs programs. These features don’t integrate into existing user-management tools, such as WhatsApp, Signal, Telegram, or even SMS- which are common in the workforce.
Source: https://thehackernews.com/2021/08/users-can-be-just-as-dangerous-as.html