Multi-factor authentication requires a second proof of identity beyond the password: an authenticator code, a push approval, a hardware key or a biometric. It is the single most effective control against account takeover, which is why every security framework from the Essential Eight to Cyber Essentials mandates it.
In workplace platforms MFA usually arrives through single sign-on: the identity provider enforces it once, and every connected application, including desk booking and visitor management, inherits it. That is the clean pattern: one MFA policy, centrally managed, no per-app bolt-ons.