Does Synapse Link for Dataverse use access key to authenticate and push data to the Storage Account?

Question

For a customer, the Synapse Link for Dataverse fails whenever storage account access key is disabled. So, wanted to check if Synapse Link for Dataverse uses access key to authenticate and push data to the Storage Account.

Also, another question is whether Synapse link for DV will fail if the storage access key is rotated.

Answer 1

Hello @Abhishek Sarkar ,

Every secure request to an Azure Storage account must be authorized. By default, requests can be authorized with either Azure Active Directory (Azure AD) credentials, or by using the account access key for Shared Key authorization. Of these two types of authorization, Azure AD provides superior security and ease of use over Shared Key, and is recommended by Microsoft. To require clients to use Azure AD to authorize requests, you can disallow requests to the storage account that are authorized with Shared Key.

When you disallow Shared Key authorization for a storage account, Azure Storage rejects all subsequent requests to that account that are authorized with the account access keys. Only secured requests that are authorized with Azure AD will succeed.

The default setting on the storage account is

Enabled- Allow storage account key access

Disabled- Default to Azure Active Directory authorization in the Azure portal

When you disable Allow storage account key access, You should enable AAD. I believe this is the reason for the failure.

I hope this clarifies you.

Reference document: https://learn.microsoft.com/en-us/azure/storage/common/shared-key-authorization-prevent?tabs=portal#remediate-authorization-via-shared-key

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