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The domain controller that seizes the role must be fully up-to-date with the mcsa updates performed on the previous role owner. Because of replication latency, it is possible that the domain controller might not be up-to-date. To check the status of updates for a domain controller, use the Repadmin.exe: Replication Diagnostics command-line tool, included with the Windows Support Tools on the Windows Server 2003 CD-ROM in the \Support\Tools folder.
When a user authenticates across a trust with the Selective authentication option enabled, an Other Organization security ID (SID) is added to the user’s authorization data. The presence of this SID prompts a check on the resource domain to ensure that the user is allowed to authenticate to the particular service. Once the user is authenticated, if the Other Organization SID is not already present, the server to which the user authenticates adds the This Organization SID. Only one of these special SIDs can be present in an authenticated user’s context.
Administrators in each domain can add objects from one domain to access control lists (ACLs) on shared CCNA exam resources in the other domain. You can use the ACL editor to add or remove objects residing in one domain to ACLs on resources in the other domain. For more information about how to set permissions on resources, refer to Chapter 9, “Administering Active Directory Objects.”
Requirements To create an external trust, you must have Enterprise Admin or Domain Admin privileges for the domain in the Windows Server 2003 forest, and Enterprise Admin or Domain Admin privileges for the domain outside of the forest. Each trust must be assigned a password that is known to the administrators of both domains in the relationship.
Allowed To Authenticate is a new access control right that allows you to control which users from other domains can authenticate to a particular type of object or service.
The Ntdsutil tool allows you to transfer and seize operations master roles. When you use the Ntdsutil command-line tool to seize an operations master role, the tool attempts a transfer from the current role owner first. Then, if the existing operations master is unavailable, it performs the seizure.
Once you have planned all of the domain roles for each domain, consider the forest roles. The schema master and the domain naming master roles should always be assigned to the same domain controller. For best performance, assign them to a domain controller that is well connected to the computers used by the administrator or group responsible for schema updates and the creation of new domains. The load of these operations master roles is very light, so, to simplify management, place these free exam papers roles on the operations master domain controller of one of the domains in the forest.
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