Outbound Rule Necessity: For successful cluster deployment, certain outbound connections must be allowed to ensure proper download and configuration of resources.

Critical Destination: 'Https://downloads.cloud.nutanix.com/*' is a critical endpoint from which the Nutanix software and updates are downloaded during the cluster deployment process.

Functionality: Ensuring an outbound rule for this destination allows the deployment to fetch necessary files and updates, enabling smooth cluster setup and operation.

Other Destinations:

Https://portal.nutanix.com/: Used for accessing the Nutanix portal, not directly related to deployment downloads.

Https://support.nutanix.com/: Used for support-related tasks, not for deployment-specific downloads.

https://nutanix.dev/: Related to development and API documentation, not necessary for initial deployment.

Conclusion: Outbound connectivity to 'Https://downloads.cloud.nutanix.com/*' is essential for downloading deployment resources.

Nutanix NC2 on Azure Network Configuration Guide

Azure Network Security Documentation