Currently Ops Manager authentication supports either the Application Database, LDAP, or SAML, but these methods cannot be combined. Ideally we would like to move to LDAP, but we are stuck with the local authentication method as we depend on a local admin user which is used when first deploying and configuring the Ops Manager ecosystem. We also do not want to depend solely on the availability of the LDAP servers regarding an admin user. The MongoDB cluster deployments do support multiple authentication methods at the same time (we have local admin and monitoring accounts while users are authenticating via LDAP), it would be great if you could allow the same setup for Ops Manager.