@el_mark 

if your notebook on the dedicated compute shows the expected public IP via ipify, but queries still fail while serverless works, it strongly suggests the Azure Storage firewall (or network rules on the storage account) is only allowing the serverless IPs and not the egress IPs from your AWS VPC.

Check

1. The egress IP/CIDR of your AWS VPC (non‑serverless warehouse / compute) is added to the Azure Storage Account firewall allow list.
2. Any Delta Sharing IP access list on the provider side also includes this IP/CIDR https://community.databricks.com/t5/data-engineering/delta-sharing-open-issue-with-access-data-on-st...
3. DNS/routing from that VPC can reach the Azure storage endpoint