I'm experiencing the same issue documented in the following forum post:
https://social.technet.microsoft.com/Forums/en-US/933496a9-6745-4cfb-a8d0-b88dc7e9cf4b/azure-backup-failed?forum=windowsazureonlinebackup
Data has been shipped to MS and is sitting in the correct storage account. However, the job is failing with Error: 0x1FBDE
The infrastructure has not changed, server names etc are still the same.
If someone could assist I would greatly appreciate it