Migrate from Azure to SharePoint using Migration API - "Must specify IV in Manifest or blob metadata'" - azure

Question

I am trying to use the Migration API with C# to migrate from the default free Azure Cloud (given to all sharepoint accounts) to SharePoint.
I can successfully generate a cloud container, and upload files, but the migration fails. Here is my code:
private void MigrateToAzureThenSharePoint()
{
//Provision The default Azure Containers and Migation Queue
var migrationContainers = destinationCtx.Site.ProvisionMigrationContainers();
var migrationQueue = destinationCtx.Site.ProvisionMigrationQueue();
destinationCtx.ExecuteQuery();
var containerInfoList = migrationContainers.Value;
var dataContainerUri = containerInfoList.DataContainerUri;
var metadataContainerUri = containerInfoList.MetadataContainerUri;
var queueInfo = migrationQueue.Value;
//Instansiate Cloud Queue
var cloudQueue = new CloudQueue(new Uri(queueInfo.JobQueueUri));
//Instansiate CloudBlobContainer
CloudBlobContainer dataContainer = new CloudBlobContainer(new Uri(dataContainerUri));
CloudBlobContainer manifestContainer = new CloudBlobContainer(new Uri(metadataContainerUri));
//Test files to upload
var testfiles = new[]
{
new SourceFile
{
Filename = "test.txt",
LastModified = DateTime.Now,
Contents = Encoding.UTF8.GetBytes("Hi, this is a test text-file"),
Title = "Title of file 1"
},
new SourceFile
{
Filename = "test2.txt",
LastModified = DateTime.Now.AddDays(-1),
Contents = Encoding.UTF8.GetBytes("Tesfile2"),
Title = "Second title"
}
};
//Upload Test Files to Cloud
foreach (var testfile in testfiles)
{
var blobReference = dataContainer.GetBlockBlobReference(testfile.Filename);
blobReference.UploadFromByteArray(testfile.Contents, 0, testfile.Contents.Length, null);
blobReference.CreateSnapshot();
}
var manifestPackage = new ManifestPackage(destOrganisationList.Id,
destinationCtx.Web.Id,
destinationCtx.Web.Title,
destOrganisationList.Title,
#"\",
destOrganisationList.RootFolder.UniqueId,
destOrganisationList.RootFolder.ParentFolder.UniqueId
);
//Create XML Files for Azure Migration (An easier way here would be great? I manualy write them)
var filesInManifestPackage = manifestPackage.GetManifestPackageFiles(testfiles);
//Uploaded manually created XML files
foreach (var migrationPackageFile in filesInManifestPackage)
{
var blobReference = manifestContainer.GetBlockBlobReference(migrationPackageFile.Filename);
blobReference.UploadFromByteArray(migrationPackageFile.Contents, 0, migrationPackageFile.Contents.Length, null);
blobReference.CreateSnapshot();
}
//Start Migration
var result = destinationCtx.Site.CreateMigrationJobEncrypted(destinationCtx.Web.Id,
containerInfoList.DataContainerUri,
containerInfoList.MetadataContainerUri,
queueInfo.JobQueueUri,
new EncryptionOption()
{
AES256CBCKey = containerInfoList.EncryptionKey
});
destinationCtx.ExecuteQuery();
//Check for messags
while (true) {
var msg = cloudQueue.GetMessage();
if (msg == null)
{
Task.Delay(TimeSpan.FromSeconds(1));
continue;
}
var message = JsonConvert.DeserializeObject<EncryptedMessage>(msg.AsString);
cloudQueue.DeleteMessage(msg);
//Decode encrypted message
var decoded = JsonConvert.DeserializeObject<UpdateMessage>(Decrypt(message.Content, containerInfoList.EncryptionKey, message.IV));
//Error
}
}
There are a few errors, but they all are similar to this:
"Unable to download SystemData.xml with exception 'Must specify IV in
Manifest or blob metadata'"
I believe I may have to encrypt the files when I upload from this method:
blobReference.UploadFromByteArray
There is an option:
var blobRequestOptions = new BlobRequestOptions();
blobRequestOptions.EncryptionPolicy =
But I don't know how to instantiate the encryption policy (and I may be going down a rabbit hole)
Any help would be greatly appreciated, as documentation online is shocking minimal.