Establishing Required Trusts for Your Migration
Applies To: Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, Windows Server 2012 R2
Applies to: Active Directory Migration Tool 3.2 (ADMT 3.2)
Before you can migrate accounts and resources from a source domain to a target domain in a different Active Directory forest, you must ensure that the appropriate trusts exist between the forests. Trust relationships between the forests that you are restructuring makes it possible for the Active Directory Migration Tool (ADMT) to migrate users and service accounts and translate local user profiles from the source domains to the target domains. In addition, depending on how trust relationships are configured, users in the source domain can access resources in the target domain. Moreover, users in the target domains can access resources in the source domain that have not yet been migrated.
To migrate users and global groups, you must establish a one-way trust between the source domain and the target domain, so that the source domain trusts the target domain.
To migrate resources or translate local profiles, you must do one of the following:
Create a one-way trust between the source domain and the target domain.
Create a two-way trust between source and target domains.
For more information about creating trusts, see Creating Domain and Forest Trusts (http://go.microsoft.com/fwlink/?LinkId=77381).