what is #crossrealm #trust?

Cross-realm trust is a mechanism in computer networking and security that allows users from one domain or realm to access resources in another domain or realm. In simple terms, it enables the authentication and authorization of users from one security domain to access resources in another security domain.

Cross-realm trust is commonly used in environments with multiple Active Directory domains or forests, where users and resources are distributed across different domains. By establishing a trust relationship between domains, users in one domain can access resources in another domain without having to authenticate again.

For example, if an organization has two domains, Domain A and Domain B, users in Domain A can access resources in Domain B if a trust relationship is established between the two domains. This allows users to access resources, such as files or applications, without having to create separate accounts in Domain B.

There are several types of cross-realm trusts, including one-way trusts, two-way trusts, and forest trusts. Each type of trust has its own specific requirements and implications, and the trust relationship must be carefully configured and maintained to ensure security and proper access control.