KB4241: Using Object Storage with Veeam Products
https://www.veeam.com/kb424118.11.2021 · Support for Azure Blob object storage varies between products. The following limitations currently apply to all Veeam products: Immutability is not supported. Veeam manages the entire data lifecycle of backups stored within Azure. As such, configuring the storage account with these features is unnecessary, and doing so can result in data loss.