Dealing with iCloud accounts on DEP-enrolled iOS devices
The iPad could not be restored. An unknown error occurred (9).
Movie projects disappear after iMovie upgrade
When you upgrade to the new iMovie, there’s a quick prompt to update your old iMovie projects, but if you dismissed that and don’t know how to go back and update again… Go to File > Update Projects and Events…More info at Apple: Update projects and events from previous versions of iMovie in iMovie (2014)