Cross-project search and detection rules
When cross-project search is enabled and you have linked projects, rules query data across linked projects based on the space-level cross-project search scope.
For how cross-project search applies when you create or edit rules (space-level scope, the read-only scope selector, and query-level overrides) refer to Cross-project search availability by app.
For prerequisites such as linking projects and configuring default scope, refer to Cross-project search and Configure cross-project search access and scope.
Machine learning rules don't support cross-project search; they search data in the origin project only. Other features also have limited or no cross-project search support. For details, refer to Cross-project search availability by app.