The login screen did not care who you were. It only checked if you had the right key.
That worked when apps were simple and your team was small. But now you have dozens of internal services, each in its own corner of the cloud. Engineers, contractors, and systems need access. Access changes every week. The wrong person keeping access for too long is a security breach waiting to happen. This is where Identity-Aware Proxy with SCIM provisioning stops being optional.
An Identity-Aware Proxy (IAP) puts a rule in front of every internal app: no request passes unless the user identity is verified. The check includes context—who they are, where they are, and what they should touch. It removes direct network exposure. Every request is authenticated and authorized in real time.
SCIM (System for Cross-domain Identity Management) provisioning automates creating, updating, and deleting user accounts between your identity provider and your applications. When someone joins, they get the right access instantly. When they leave, their accounts vanish from all connected services without a ticket or manual cleanup.