Understanding the Multiple-Domain Model

For various reasons, organizations might need to add more than one domain to their environment but preserve the functionality that is inherent in a single forest. When this occurs, the addition of one or multiple domains into the forest is warranted. Domain addition should not be taken lightly, however, and proper consideration must be given to the particular characteristics of multiple-domain models.

By default, two-way transitive trusts exist between subdomains and domains in AD DS. Bear in mind, however, that this does not mean that resource access is automatically granted to members of other domains. A user in subdomain B is not automatically granted any rights in domain A; the rights need to be explicitly ...

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