Which sharing option provides the highest level of accessibility in Portal for ArcGIS?

The sharing option that provides the highest level of accessibility in Portal for ArcGIS is public access settings. When content is shared publicly, it becomes available to anyone with access to the internet, regardless of whether they have an account in the Portal. This means that users can view maps, apps, and other shared content without the need for specific sign-in credentials or group memberships, thus maximizing exposure and accessibility.

Public access settings are particularly valuable for organizations that want to disseminate information broadly without restricting it to a select group of users. This approach is commonly used for public outreach, educational purposes, or community engagement initiatives.

In contrast, options such as groups and user profiles limit accessibility to only those within a specified group or to designated users, which does not allow for the same level of openness that public access provides. Direct email links share content directly with recipients, but the content remains restricted to those individuals and does not allow broader public access. Therefore, public access settings are the most advantageous for reaching a wide audience.