Azure Storage—Restoration of NSG flow logs retention

Retention on NSG flow logs was recently disabled, however, the functionality has been restored for general purpose v2 (GPv2) accounts, Blob storage accounts, and premium block blob storage accounts. Support for general purpose v1 (GPv1) storage accounts in NSG flow logs is being deprecated and retention for them will not be restored.
Source: Azure Roadmap
Source Link: Azure Storage—Restoration of NSG flow logs retention