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docs: clarify multi-tenant issuer requirement for Work IQ auth #113

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Laura Graham (Lauragra) merged 2 commits into from
Jul 1, 2026
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docs: clarify multi-tenant issuer requirement for Work IQ auth #113

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docs: clarify multi-tenant issuer requirement for Work IQ auth
TarunReddy-msft Jun 29, 2026
2a97fd2
Update api-overview.md
Lauragra Jul 1, 2026
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5 changes: 3 additions & 2 deletions docs/work-iq/api-overview.md
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Expand Up @@ -5,7 +5,7 @@ author: jasonjoh
ms.author: jasonjoh
ms.topic: overview
ms.localizationpriority: medium
ms.date: 06/02/2026
ms.date: 06/29/2026
---

<!-- markdownlint-disable MD024 -->
Expand Down Expand Up @@ -236,7 +236,8 @@ Work IQ uses Microsoft Entra ID delegated authentication.
- On-behalf-of (OBO) flows are supported.
- Application-only authentication isn't supported.
- Microsoft 365 permissions, sensitivity labels, and compliance policies are enforced automatically.

> [!IMPORTANT]
> In multi-tenant (parent/child) organizations, the access token's issuer (`iss`) must match the tenant the signed-in user belongs to, not the tenant where the app is registered. Work IQ enabled in both tenants isn't enough. Register the app as multi-tenant (`AzureADMultipleOrgs`) and have users sign in through their home tenant's authority. Otherwise, the request fails with `400 AuthenticationError: "Error authenticating with resource"`.
## Path forward for new development

Work IQ is the recommended foundation for new agentic and AI-powered applications on Microsoft 365 data. Build new development on Work IQ APIs to take advantage of unified protocols, integrated governance, and continued investment.
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