Issue
Post Orlando, users are unable to attach the document to the KB article , when the status of the article is set to published, retried, out_dated .
Cause
Client script onload "Hide Attachment Link when read only" introduced in Orlando which is limiting the attach button
Resolution
This is the expected behavior. When an article is in Published state, the form is read-only until the article is checked out. Then a new version is created and you can add attachments to the new version.
That is the intended behavior with knowledge versioning enabled, if you wish to add attachments or make edits then they can disable versioning feature or disabling the client script.
