1. Go to ADUC and right-click on Saved Queries.
2. Select New, Query.
3. Type in the name and description of the query (e.g., Locked User Accounts) and then click on Define Query.
4. In the Find box, select Custom Search and then click on the Advanced tab.
5. Enter the following text for the LDAP query:
   (&(&(&(objectCategory=person)(objectClass=user)
   (lockoutTime:1.2.840.113556.1.4.804:=4294967295))))
6. Click OK twice to close all windows.
7. Simply highlight the "Locked User Accounts" query and press F5 to refresh. If you have any accounts that are locked, they will show up in the right-hand pane.

If your query fails, it's most likely because you entered carriage returns in the LDAP query. The query does not contain any spaces or carriage returns.