After a grid migration, what specific data point is transferred to the org level?

In the context of a grid migration, direct messages are transferred to the org level. This is significant because direct messages contain private communications between team members and are essential for retaining the integrity of individual conversations within an organization. During the migration process, ensuring that these personal and sometimes sensitive interactions remain accessible helps maintain continuity for users transitioning to a new workspace environment.

The other options involve data that either does not retain its personal context at the org level or are not typically migrated in the same way as direct messages. For example, files shared within channels and custom apps installed might vary by workspace or may rely on specific configurations and permissions that are unique to each team. Emoji reactions, while part of the interaction within messages, do not represent a standalone or critical data point that necessitates an org-level transfer. Thus, focusing on direct messages as the key data point emphasizes the need for preserving direct communication within the organization's grid transition.