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Mounting Data Lake Storage from a Spark Pool

Kamil Nowinski runs into some trouble:

Last weekend, I played a bit with Azure Synapse from a way of mounting Azure Data Lake Storage (ADLS) Gen2 in Synapse notebook within API in the Microsoft Spark Utilities (MSSparkUtils) package. I wanted to just do a simple test, hence I followed the documentation from Microsoft: How to use file mount/unmount API in Synapse.
Having an ADLS Account already created in a subscription – should be easy peasy, right?

Read on to understand when things might be a little more complicated than they seem. And more frustrating, once you see the cause of the problem.