Articles do not appear on $knowledge.do past valid to dateDescriptionBy default, knowledge articles that have exceeded their valid to date are no longer searchable on the ITIL knowledge homepage or in contextual search results. Is there a way for developers to allow users to search for articles that have exceeded their valid_to date?CauseCurrently, a query on the valid_to field on $knowledge is hard-coded in the platform and cannot be removed from the front-end.ResolutionThis behavior is as designed. The only option is to change the valid_to field date or, if you need this for some other cause, create a new field for that and move the data to that new field.Additional InformationThis blog post in our Community provides a possible workaround that may help you: Adding an expiration date to Knowledge Base articles