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13 aprile 2026

IdP-initiated and SP-Initiated Authentication Flows

In an AD FS-federated configuration, the authentication flow differs depending on where the user initiates the login request. This guide differentiates between IdP-initiated and SP-initiated login requests.

This guide uses the following terminology to refer to the origin of an authentication request:

  • An identity provider-initiated (IdP-initiated) flow occurs when the user attempts to log in to an application from the Hub portal.
  • A service provider-initiated (SP-initiated) flow occurs when the user attempts to log into an application directly from the application's sign-in portal (for example, portal.office.com for Office 365).

Your configuration can support both IdP-initiated and SP-initiated authentication flows. To support each type of authentication flow, you must configure certain settings, such as access policies in Omnissa Access.

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