When you have a global catalog server in a local site, logons and network queries are faster. The disadvantages to having a global catalog lie in the additional traffic that is caused during replication, queries, browsing, and logons. You can overcome much of these traffic issues when you configure your sites and site links and select whether to use a global catalog server or to enable universal group caching on a domain controller. Continue reading here: Creating a Global Catalog Server.
The domain-naming update for the domain has not reached the domain controller that is experiencing the problem. Or, the domain-naming update for a domain that is newly promoted may not have reached any domain controllers outside that domain. This issue would be a temporary problem. You should not enable a reduced occupancy level to artificially accelerate global catalog promotion. We strongly recommend that you first resolve the Directory Service replication issue so that the global catalog is automatically advertised.
To resolve this problem, first identify the root cause of the replication issue, and resolve that problem. Determine whether the replication issue is caused by one of the following conditions:. Make sure that network connectivity is good and that no required network ports are blocked.
If there are incorrect records, you must clear them out and register such records. Remove all stale metadata for any domain controllers and domains in the forest that are listed in the relevant event IDs.
You must do this to make sure that replication is not failing because of a non-existent domain controller or domain. For more information about how to remove Active Directory metadata, see the following article:.
Clean up Active Directory Domain Controller server metadata. After you have verified that the replication between domain controllers is working correctly, determine whether there is an orphaned domain object. You can use the Ntdsutil. If there is any orphaned domain controller object for that domain, you must also delete the domain controller object.
For more information about how to remove an orphaned domain, see the following article:. How to remove orphaned domains from Active Directory. For more information about how to remove orphaned domain controller objects, see the following article:. After you promote the domain controller to a global catalog server, domain partitions in the forest will be replicated to the new global catalog server.
When all partitions have successfully replicated to the new global catalog server, event ID will be logged in the Directory Services log on the domain controller. The event description states that the computer is now advertising itself as a global catalog server. Best of Techopedia weekly. News and Special Offers occasional.
Global Catalog GC. Techopedia Explains Global Catalog GC A global catalog is a multi-domain catalog that allows for faster searching of objects without the need for a domain name. Some of the common global catalog usage scenarios are as follows: Forest-wide searches User logon Universal group membership caching Exchange address book lookups. Related Question What is involved in active directory monitoring?
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