What option must be set to allow users to share content publicly in ArcGIS Online?

To allow users to share content publicly in ArcGIS Online, it is essential to enable sharing in the organization's settings. This setting establishes the overarching permissions framework within which all members of the organization operate. If sharing is not enabled at the organizational level, individual users will not have the capability to share their content with the public, regardless of their own item settings or permissions.

This foundational step is critical because it aligns with organizational policies and ensures that all users are compliant with the standards set for public sharing. It serves to manage content accessibility not just on a per-item basis, but as part of a cohesive strategy to govern how data and resources are distributed externally.

Establishing the right sharing permissions allows for flexibility and control, enabling organizations to determine what content can be shared publicly while still protecting sensitive or proprietary information within their own domain.