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Error "External table 'dbo' is not accessible" When Connecting to Azure SQL Synapse Analytics


Published: 28 Jun 2021
Last Modified Date: 28 Jun 2021

Issue

The following error occurs when connecting a Synapse serverless pool:

External table 'dbo' is not accessible because location does not exist or it is used by another process.

Environment

  • Tableau Desktop
  • Azure Synapse Analytics (formerly Azure SQL Data Warehouse)

Resolution

Grant 'Storage Blob Data Contributor' permission to the external data source for the authentication method that you use in the Azure Data Factory (ADF). 

Cause

According to this Microsoft document, this error may occur because the authentication method that you use doesn't have a correct permission to the external data source where the external table referring to. 
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