How does it integrate with our existing systems and applications (both on-prem and SaaS)?

Hitachi ID Identity Manager ships with more than 130 built-in connectors for popular systems and applications. This includes directories, servers, databases, Unix/Linux, z/OS mainframes, iSeries and other legacy operating systems, ERP and CRM applications, e-mail and collaboration software, tokens, smart cards, web access management systems, help desk / incident management systems and drive encryption products. There are connectors for both on-premises and SaaS applications. In addition to pre-built connectors, there are also scriptable connectors, suitable for adding new integrations at implementation time. Read more here: https://hitachi-id.com