Data Warehouse with Private Link enabled + Lookup activity - Cannot connect to SQL Database

SimonDalecky 

It appears the Data Warehouse endpoint is currently inaccessible for any pipeline activity (including a Lookup activity) when Private Link is enabled. The documentation explicitly mentions that copying data from or into a Data Warehouse isn’t possible, and even though it doesn’t call out Lookup activity by name, the underlying limitation means the Data Warehouse SQL endpoint can’t be reached from the pipeline runtime once Private Link is enabled. In practice, this blocks queries or stored procedures in Lookup, copy activities, or other attempts to connect to the warehouse.
Many users see the same behavior—a connection failure—because the Data Warehouse endpoints don’t support these operations over the private network yet. Disabling Private Link or using other endpoints (such as a Lakehouse) is often the only current workaround. If you must work with the Warehouse, you may need to revert to public access or use an alternative path until the platform’s roadmap includes support for private-link-enabled Data Warehouse pipeline operations.

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