We would like to add validation when saving ACL for content. We have a specific pagetype that should NOT have read access for "Everyone", which editors from time to time set by accident.
We added validation to the publish event of the page type, this has made problem smaller, but it is still possible to change the security settings after the page has been published.
I cannot find any way to cancel the save event or add validation to the ContentSecuritySaved method in IContentSecurityRepository?
That event is typically used when indexing content to Find so probably not a way to cancel in there. This event should work though if you're on that version or later: http://world.episerver.com/documentation/Release-Notes/ReleaseNote/?releaseNoteId=CMS-3982
Cool, thanks! :)