What does Windows error code 8403 (ERROR_DS_CANT_REMOVE_ATT_CACHE) mean?

 
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ERROR_DS_CANT_CACHE_CLASS ERROR_DS_CANT_REMOVE_CLASS_CACHE

ERROR_DS_CANT_REMOVE_ATT_CACHE

Schema cache cleanup could not detach an attribute definition

The in-memory Active Directory schema model contains attribute definitions and the relationships that refer to them. This status identifies a failure while removing an attribute from that cache. It should be investigated as schema-state management, not as a write failure on one ordinary directory object.

Check whether class definitions still reference the attribute through mandatory or optional lists and whether a recent schema update attempted to deactivate or replace it. The neighboring statuses for attributes used in mustContain and mayContain are particularly relevant because unresolved dependencies prevent a coherent schema model. Preserve the earlier event sequence before forcing another cache rebuild.

What to inspect

  • Search class schema references to the target attribute.
  • Review the exact schema modification that preceded cache removal.
  • Avoid repeated cache refreshes until dependency and consistency errors are understood.

References


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