Fotoware Alto IDS  is the Fotoware Alto Identity Server, which serves as the default trusted Identity Provider for Fotoware Alto (previously Picturepark Content Platform). All identity information (e.g., user attributes) is saved in the Fotoware Alto IDS. You can access multiple Fotoware Alto tenants with the same identity.

Whenever Office 365 needs to verify a user, for example, Azure AD performs all identity and access management and is thus the trusted identity provider.