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ERROR_DS_NOTIFY_FILTER_TOO_COMPLEX
The persistent notification filter exceeds supported complexity
Active Directory change notification uses an asynchronous LDAP search with the notification control. Microsoft documents a deliberately simple search pattern for broad notifications, commonly the filter (objectClass=*). The notification mechanism reports changes within the selected scope; it is not a general replacement for repeatedly evaluating an arbitrarily expensive LDAP query plan.
Capture the exact filter tree, search base, scope, and attributes. Simplify boolean nesting and expensive matching conditions, then perform application-side filtering after a notification when practical. If the application needs resumable change enumeration or richer server-side filtering, compare notification behavior with DirSync instead of continually making the notification filter more elaborate.
What to inspect
- Log the final LDAP filter after all application substitutions.
- Reduce the notification search to a stable broad predicate where possible.
- Evaluate DirSync when the consumer needs stateful change tracking rather than a live wake-up signal.
References
- Microsoft: change notifications in Active Directory Domain Services
- MS-ADTS: LDAP extended controls supported by Active Directory
- IETF RFC 4511: LDAP protocol operations and result semantics
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