In my firm we enroll iPhones via our DEP programme, and manage them through a MDM server.
Our colleagues receive a pre-configured iPhone, but they are allowed to use a personal iCloud account to transfer settings from their previous device to the new iPhone.
Everything works fine: photos, voice memos, WhatsApp history, everything you could think of… Except Messages (the regular iPhone text messages).
We can see that they are backed up to iCloud (30.5 MB in this case), and I personally saw the Messages app showing the blue progress bar while backing up all messages, but the new device is not 'downloading' them at all.
How can this be resolved? Is this a common problem?