Error SQL71501 on exporting Azure SQL Database

This is Xiaochen from Microsoft SQL team. We are already working on the fix of this issue. The fix will be deployed to the export service in next few weeks. In the same time, the fix is already available in the latest DacFX 16.4 (https://blogs.msdn.microsoft.com/ssdt/2016/09/20/sql-server-data-tools-16-4-release/). Before we fix this issue in the service, you can download the DacFX 16.4 and use sqlpackage to work around.