Selecting the Domain Model for You

Single DomainOne domainCentralized administration of accounts on the PDCCentralized administration of resourcesFor organizations with fewer than 15,000 users Trusts: no trusts needed

Master DomainMore than one domain, with one master domain and one or more resourcedomains Centralized administration of accounts on the master domainLocal administration of resources on the resource domains For organizations with fewer than 15,000 users Trusts: all resource domains trust the master domain, but the resourcedomains don't trust one another

Multiple Master DomainMore than one domain, with one or more master domain and one or moreresource domains Centralized administration of accounts on the master domains Local administration of resources on the resource domains For organizations with more than 15,000 usersTrusts: all master domains trust one another, all resource domains trustthe master domains, but the resource domains don't trust one another

Complete Trust DomainMore than one domain Local administration of accountsLocal administration of resourcesFor organizations of any sizeTrusts: every domain trusts every other domain