One of our clients is planning an integration between ArcGIS Enterprise (Portal deployed in an intranet-only environment) and SharePoint Online.
From a network and security standpoint, the requirement is to allow outbound access from ArcGIS Enterprise to specific SharePoint Online URLs/endpoints, while restricting inbound access to ArcGIS Portal so that it remains accessible only via VPN or internal network.
In this model:
- Is egress-only connectivity to SharePoint Online supported without exposing ArcGIS Portal publicly?
- What network or security architectures (e.g., proxy, firewall rules, DMZ) are commonly implemented for this use case?
- Are there any ArcGIS Enterprise components that inherently require inbound internet access when integrating with SharePoint Online?
Thank you for your insights.