Unable to remove attached knowledge from incident/casesIssue Once knowledge articles are attached to the incidents/cases, it cannot be removed by itil users. There is an option of edit where you can relate or remove the knowledge articles through the slush bucket. Only relating is working but removal is not happening. Suspected cause is due to the following ACL (Access Control List) which require only knowledge admin role to delete the entry from the form ‘m2m_kb_task’. This should not be the case. Even itil users should be able to remove the relationship if it is not needed. ResolutionIn Out of Box (OOB) knowledge management, we do not have "Edit" and "New" UI actions enabled on the attached knowledge related list which is definitely an expected behavior.But in this case this functionality has been customized , so it was made visible for an itil (Information Technology Infrastructure Library) user (might be with the help of some ACL (Access Control List) or changing UI (User Interface) Action conditions)This is an OOB behavior where an itil user with knowledge role should not have access to detach any article from attached knowledge related list(a m2m table basically).Users should not be allowed to attach articles from this related list. Contextual search should be used instead which is much faster and robust and user friendly search. Read more about it here - Define contextual searchAlso, knowledge base and article user criteria's are defined to restrict users to view knowledge articles.Consider a scenario where 3 articles are attached to the incident but an itil user does not have access to them. In that case even if you have edit button on the related list, this itil user wont be able to see these article and hence detaching them from incident is OOB for obvious reason.OOB only knowledge admin/admin can detach the article.