-1. Unlike blob indexers, ADLS Gen2 indexers cannot utilize container level SAS tokens for enumerating and indexing content from a storage account. This is because the indexer makes a check to determine if the storage account has hierarchical namespaces enabled by calling the [Filesystem - Get properties API](https://learn.microsoft.com/rest/api/storageservices/datalakestoragegen2/filesystem/get-properties). For storage accounts where hierarchical namespaces are not enabled, customers are instead recommended to utilize [blob indexers](search-howto-indexing-azure-blob-storage.md) to ensure performant enumeration of blobs.
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