Fotis's organization-wide implementation of IDaaS offers broad support for cloud-based applications. Fotis's company does not have internal identity management staff and does not use centralized identity services. Instead, they rely upon Active Directory for AAA services. Which of the following options should Fotis recommend to best handle the company's on-site identity needs?

Since Fotis's organization is using a cloud-based identity as a service solution, a third-party, on-premises identity service can provide the ability to integrate with the IDaaS solution, and the company's use of Active Directory is widely supported by third-party vendors. OAuth is used to log in to third-party websites using existing credentials and would not meet the needs described. SAML is a markup language and would not meet the full set of AAA needs. Since the organization is using Active Directory, a custom in-house solution is unlikely to be as effective as a preexisting third-party solution and may take far more time and expense to implement.