What is the function of a Cross-Signed Forest?

A Cross-Signed Forest serves to establish trust relationships between forests, which is crucial for facilitating resource sharing and inter-forest communication in complex organizational structures. In a scenario where multiple Active Directory forests exist, a cross-signing allows these independent forests to trust each other without requiring a direct trust relationship through a third-party certificate authority.

This mechanism is particularly valuable in environments where organizations have merged or need to collaborate while maintaining separate Active Directory instances. By creating trust through cross-signing, users in one forest can access resources in another forest securely and seamlessly, which supports cohesive enterprise operations and enhances collaboration efforts.

In contrast, the other options do not accurately reflect the purpose of a Cross-Signed Forest. Limiting domain access pertains more to controlling permissions rather than inter-forest relationships. Enhancing security within single-computer environments does not involve cross-signing, as this is more about local security measures. Lastly, organizing workgroups efficiently is a different focus altogether, primarily dealing with structuring teams rather than technical trust establishment between separate directory services.