This is on an ipad.The Minecraft App does not sign into Microsoft account - so marketpace is not available and inviting friends is not possible.  I have backed up the 'games' data folder, deleted and reinstall app. At this point I can sign into the microsoft account with no issue. However, as soon as I restore the games data the microsoft sign in no longer works. It is very frustrating. I assume there is a file corruption issue but cannot find any details of where this might be.