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Info box about IAS MT availability #2950

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added info box about IAS MT availability
BraunMatthias Oct 15, 2026
220e970
Update guides/security/authentication.md
renejeglinsky Oct 20, 2026
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13 changes: 9 additions & 4 deletions guides/security/authentication.md
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Expand Up @@ -284,17 +284,22 @@ Integration tests running in production profile should verify that unauthenticat

## IAS Authentication { #ias-auth }

::: tip
**Start new projects with IAS** to take advantage of the best integration options.
IAS offers a cross-consumption mode that allows IAS users to consume legacy XSUAA services.
:::

> [!caution]
> SAP Identity Authentication Service is only available for **single tenant applications**.
> SAP-internal also multitenant applications are supported. <!-- INTERNAL -->

[SAP Identity Authentication Service (IAS)](https://help.sap.com/docs/cloud-identity-services) is the preferred platform service for identity management providing the following features:
- best of breed authentication mechanisms (single sign-on, multi-factor enforcement)
- federation of corporate identity providers (multiple user stores)
- cross-landscape user propagation (including on-premise)
- streamlined SAP and non-SAP system [integration](https://help.sap.com/docs/cloud-identity-services/cloud-identity-services/integrating-service) (due to [OpenId Connect](https://openid.net/connect/) compliance)

::: tip
**Start new projects with IAS** to take advantage of the best integration options.
IAS offers a cross-consumption mode that allows IAS users to consume legacy XSUAA services.
:::

You can best configure and test IAS authentication in the Cloud, so let's enhance the [previously started bookshop sample application](#mock-user-authentication) with a deployment descriptor for SAP BTP, Cloud Foundry Runtime (CF).


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