Hello @Verma, Namrata ,
Welcome to the Microsoft Q&A Platform! Thank you for asking your question here.
Based on verbatim 403 typically means Fabric/Dataflow Gen2 can reach the service, but the request is being denied due to permissions, tenant settings, capacity/workspace configuration, or a temporary Microsoft service issue.
Based on Microsoft Fabric guidance the most common causes are:
(1) Insufficient permissions on the Lakehouse
(2) Lakehouse and Dataflow are in different workspaces/capacities
(3) Private Link / Network Restrictions
(4) Tenant Settings Restrictions
(5) Corrupted/Failed Connection Metadata
For more information, please review the URLs below.
https://learn.microsoft.com/en-us/fabric/data-factory/dataflow-gen2-data-destinations-and-managed-settings https://community.fabric.microsoft.com/discussions/ac_generaldiscussion/lakehouse-connection-issue/4598835/replies/4598941 https://learn.microsoft.com/en-us/fabric/data-factory/default-destination