Hi @Rajesh Kannan R​ , Allow Blob Public Access means that a storage account allows public blob/container access levels on the containers. If this is disabled then it means all containers must be private. When containers are private then you must authenticate with key, sp, etc. Please validate the authentication for these containers.

https://azure.microsoft.com/en-in/updates/choose-to-allow-or-disallow-blob-public-access-on-azure-st...