Solving the AWS Backup Cross-Account, Cross-Region Copy Conundrum with Lambda

This article details how the author overcame the limitation of AWS Backup not supporting cross-account and cross-region backups simultaneously. Driven by security and disaster recovery policies, a solution was needed to store backups in separate accounts and regions. The author meticulously outlines a solution using AWS Backup, EventBridge, and a Lambda function to achieve cross-account, cross-region backup replication. This includes configuring source and destination account Vaults, policies, EventBridge rules, and a Lambda function, addressing encryption and permissions. The author successfully implements this, offering further optimization suggestions such as automated restore testing and cost monitoring.