Hi @tdata ,

The error you’re seeing is most likely a networking or permissions issue, not the URI.

Can you double-check that a metastore admin has enabled “External data access” for the metastore? Also, your principal needs EXTERNAL USE SCHEMA on the target schema (and standard USE CATALOG/USE SCHEMA/SELECT on the table).

If all of that looks good, you can check bucket policy/network reachability for serverless: ensure your bucket policy allows access for the storage credential role and does not block requests based on VPC source or IP ranges that exclude Databricks serverless egress.