Like the Knowledge Side bar component, the Knowledge One widget can automatically search knowledge articles based on the case subject entered when a case is created or edited.
If you have the Knowledge Setting "Suggest related articles on cases" enabled, the search attempts to dynamically return relevant articles based on other criteria in addition to the case subject. See Enable Salesforce Knowledge for more details.
You may see varying behavior with how the Knowledge One widget's search term is populated based on the case subject. Since you can use a combination of different configurations that influence the way the case interacts with the Knowledge One widget you may see the following behaviors:
The existing case subject is not populated into the widget as a search term if the Knowledge setting "Suggest related articles on cases" is enabled. If the feature is disabled the case's subject is automatically entered into the Knowledge One widget's search field. To access the setting, from Setup go to Customize | Knowledge | Settings, under Knowledge One. See Setting Up Salesforce Knowledge.
The widget's search term is not dynamically updated upon creation or edit of the case subject if the Knowledge One Component is not set as the Right Sidebar (Knowledge Sidebar) custom console component for your case page layouts.
1. Navigate to the page layouts for the Cases object:
In Lightning Experience:
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