I changed my Microsoft account profile picture yesterday afternoon, my account is set to sync because before changing my account picture it was the previous one that was synced. So now it’s still the old Microsoft account picture, the store and apps show the new one but the account picture didn’t change and when I add a email account in mail, the icon is the old profile picture... so it’s like it did a 10% sync ... how long before I see the complete changes or sync.