These events will actually give you an assessment on whether your query is deemed expensive or not. If your query is expensive and an attribute or attributes being queried for are not indexed then this may suggest that you go ahead and create an index for them. To add these events edit your DCs registry like this. If the values below are missing then add them. A reboot of the domain controller is not necessary:. The general idea is that if you see 10, entries for a particular attribute examined then that is expensive.
In the details pane, right-click the attribute that you want to index, and then click Properties. There are several ways to check to see if an attribute is already indexed or not. I would first suggest searching MSDN for the default schema definition for that attribute. A comprehensive list is here , but you can simply use your favorite search engine to find them just as well. An alternate method, one that is more definitive for your individual environment, would be to look at that schema attribute using LDP.
The basic idea is that if the searchFlags value is 1 then the attribute will be indexed, like below:. A few more things to keep in mind when considering whether to index. First, whatever index you create must be replicated throughout your domain or forest depending.
Really what this means is not that the index itself is replicated as an entity but rather the attribute in the schema is set to index and then the different replica domain controllers take that action to index things then they will do so.
Why is that a consideration? If you are a developer looking for a general overview of Active Directory schema, see the Active Directory Schema overview topics. If you are looking for programming guidelines for updating or modifying the schema, For more information about extending and customizing the schema, see Extending the Schema , as well as many of the topics in the Active Directory Domain Services and Active Directory Lightweight Directory Services programming guides.
In each of the reference topics, there is a section for each operating system that the topic applies to. The following operating systems are currently supported. If an operating system is not listed in the topic, the topic is not supported on that operating system. Skip to main content. This browser is no longer supported. The result of 8 Or 2,,, is 2,,, Technically this value is not possible as it exceeds the maximum allowed for a bit integer.
Instead, the system "wraps" the value into a negative number. The value 2,,, becomes -2,,, Most utilities, scripts, and programs that accept LDAP syntax filters will work correctly with either value. However, in case the utility can only handle bit integers it would be safest to use the negative number. There are five FSMO roles.
There is one of these FSMO roles for each domain. The parent of this object will have a Relative Distinguished Name identical to that of the corresponding DC. Many times you can take advantage of the fact that only one class of object in Active Directory has a particular attribute.
For example, only group objects have the groupType and member attributes. However, if your query only has the one filter, it will be checked against all objects in Active Directory. It turns out that if you also use the second clause to restrict the query to groups , it runs faster. Although a clause similar to! However, cases have been reported where it raises an error. Richard Mueller. Comment: Added filter for user accounts in AD that do expire. Comment: Added tag. Comment: Added tags.
Comment: Fixed external link. Craig Lussier. Craig Lussier edited Revision Comment: added en-US to tags and title. Comment: Added more to note Comment: Added note Thank you for your patience.
Posted by Craig Lussier. Posted by Roman Migranov. I've translated this article into Russian social. Posted by Richard Mueller. Thank you Roman. I appreciate what you have done. I added a reference to the Russian article.
Posted by Rich Prescott. Posted by Awinish. Comment: Format example table, add tag. All rights reserved. Terms of Use Trademarks Privacy Statement 5. Groups with cn starting with "Test" or "Admin". Objects with sAMAccountName that begins with "x", "y", or "z". All users with "Password Never Expires" set Note 4. All users not required to have a password Note 4. All users with "Do not require kerberos preauthentication" enabled. Users with accounts that do not expire Note 5.
Accounts trusted for delegation unconstrained delegation.
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