Confluent Cloud Managed Connector IP Whitelisting Not working

Trying out confluent cloud sink connectors for azure blob storage.
When the blob storage is set to public Public network access - Enabled from all networks, the connector works.
But when I only whitelist the “Egress Static IP Addresses for Confluent Cloud Connectors” it doesn’t work.
I got the IPs from the networking page from the Cluster networking page but our network guys says we’re probably not whitelisting the right IPs.
I don’t have any DNS whitelisting either, only the Egress Static IPs.