Just a quick one as it took slightly longer to solve than it possibly should have done so this might help others with the same problem.
I was working fine with an Azure Data Lake Store for a few weeks until yesterday when I couldn’t access the files anymore.
The Azure Portal reported the following:
Authorization Failed - The user does not have the permission to perform this operation.
It turns out I was accessing it from a new location and the ADLS Firewall needed updating to whitelist my IP Address….
After adding my IP, the Data Lake Store is now accessible again.