Our client asked for a few updates on a legacy Umbraco 7 project. One issue we're having is that newly published pages look good one day and by the next morning they are returning "Not Found - The requested document was not found on this server." errors. The page is still there in the content tree. The band aid fix is to republish the page. Now that it's happened two nights in a row, I'm thinking there's some task that's running over night that is unpublishing the page, but I'm not sure why that would be. Has anyone else experience this on Umbraco 7? UPDATE: Changes to existing content pages are also reverted to previous version over night. I tested an app pool recycle and this is the cause. To be clear, no changes need to be made again. All changes are still visible in the back office, but not live. The fix is only to republish the page. Then the changes are gone again the next day.