microsoft/autogen · error · ValueError

Authentication failed. Please check your credentials.

Error message

Authentication failed. Please check your credentials.

What it means

Error "Authentication failed. Please check your credentials." thrown in microsoft/autogen.

Source

Thrown at python/packages/autogen-ext/src/autogen_ext/tools/azure/_ai_search.py:407

        Raises:
            ValueError: If index doesn't exist or authentication fails
        """
        if self._client is not None:
            return self._client

        try:
            self._client = SearchClient(
                endpoint=self.search_config.endpoint,
                index_name=self.search_config.index_name,
                credential=self.search_config.credential,
                api_version=self.search_config.api_version,
            )
            return self._client
        except ResourceNotFoundError as e:
            raise ValueError(f"Index '{self.search_config.index_name}' not found in Azure AI Search service.") from e
        except HttpResponseError as e:
            if e.status_code == 401:
                raise ValueError("Authentication failed. Please check your credentials.") from e
            elif e.status_code == 403:
                raise ValueError("Permission denied to access this index.") from e
            else:
                raise ValueError(f"Error connecting to Azure AI Search: {str(e)}") from e
        except Exception as e:
            raise ValueError(f"Unexpected error initializing search client: {str(e)}") from e

    async def run(
        self, args: Union[str, Dict[str, Any], SearchQuery], cancellation_token: Optional[CancellationToken] = None
    ) -> SearchResults:
        """Execute a search against the Azure AI Search index.

        Args:
            args: Search query text or SearchQuery object
            cancellation_token: Optional token to cancel the operation

        Returns:
            SearchResults: Container with search results and metadata

View on GitHub (pinned to 027ecf0a37)

Solutions

1. Check the credential used

Example fix

Verify the API key or token credential is valid

When it happens

Trigger: Thrown at python/packages/autogen-ext/src/autogen_ext/tools/azure/_ai_search.py:407 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Authentication and authorization failures — expired tokens, bad credentials, and missing scopes.

AI-assisted analysis of microsoft/autogen@027ecf0a37 (2026-08-15). Data as JSON: /api/errors/b0ed231df063e0d5. Report an issue: GitHub.