First

How should I manage identities on Google Cloud Platform?

Users need access to LDAP applications

Cloud Identity is an "Identity as a Service (IDaaS) and enterprise mobility management (EMM) product that provides identity services and endpoint administration for G Suite or as a stand-alone product.

"As an administrator, you can use Cloud Identity to manage your users, apps, and devices from the central Google Admin console.

"Secure LDAP, a feature of Cloud Identity and G Suite, lets employees access LDAP-based apps and infrastructure using their Cloud Identity (or G Suite) credentials."