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Sweep 31 Oct 2026 · 01:10Z Build v2.1.316 534 read Stable v2.1.309 Latest v2.1.316 Next v2.1.316 Feeds RSS JSON llms.txt llms-full.txt Unofficial
HomeDocsClaude Documentation 31 Oct 2026
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Authentication for connectors changedconnectors/building/authentication

Nearest release: v2.1.316, published under an hour before upstream edited the page. Shown because the two are within 24 hours of each other. Nothing here says the release caused the edit.

Upstream edited this page at 31 Oct 2026 00:56 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 31 Oct 2026 01:00 UTC.

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189189> [!NOTE]
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191> If your authorization server is Microsoft Entra ID, you must also register the MCP server URL as an Application ID URI on your Entra app registration, or the token request fails with `AADSTS9010010`. By default, Entra accepts that URL as an Application ID URI only when it's on a domain your tenant has verified, as described in [Microsoft's identifier URI restrictions](https://learn.microsoft.com/en-us/entra/identity-platform/identifier-uri-restrictions), so an MCP server on a platform hostname such as `*.azurewebsites.net` needs a custom domain first. See [the troubleshooting entry](https://claude.com/docs/connectors/building/troubleshooting.md#microsoft-entra-id-rejects-the-resource-value) for the fix.
191> If your authorization server is Microsoft Entra ID, you must also register the MCP server URL as an Application ID URI on your Entra app registration, or the token request fails with `AADSTS9010010`. See [Microsoft Entra ID rejects the resource value](https://claude.com/docs/connectors/building/troubleshooting.md#microsoft-entra-id-rejects-the-resource-value) for the steps.
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193193If you control both hosts, an alternative is to serve the MCP endpoint and the authorization server behind a single custom domain that can route both `/.well-known/*` and your MCP path.
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