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Thank you for the additional details.
Since you've confirmed that the Oracle database is reachable from the Self-hosted Integration Runtime (SHIR), the network connectivity itself appears to be working.
The error: (1303) Incorrect linked service connection info provided to DataScan
typically indicates an issue encountered by the Microsoft Purview scan engine while processing the scan configuration rather than basic connectivity.
Could you please verify the following:
- Ensure you're using the latest Self-hosted Integration Runtime (SHIR). You can download the latest version here: https://www.microsoft.com/en-us/download/details.aspx?id=105539
- If the connection test succeeds but the scan still fails, try recreating the Oracle data source and the scan.
- Verify that the Oracle connection details (host, port, Service Name/SID, authentication method, and credentials) configured in Microsoft Purview exactly match your Oracle database configuration.
If the issue still persists after the above validation, we recommend opening a Microsoft Support request. The support team can collect the required diagnostics and engage the Product Group (PG) for further investigation if necessary.
Also, could you please let us know whether you have a Microsoft Support plan available?
References:
https://learn.microsoft.com/en-us/azure/data-factory/create-self-hosted-integration-runtime?tabs=data-factory
https://www.microsoft.com/en-us/download/details.aspx?id=105539