Rethinking 3-2-1 Rule for Microsoft 365 Backup: Two Engines, One Outcome
Security leaders don’t buy backups, they buy risk reduction and defensible compliance. The 3-2-1 backup rule remains the most durable way to break dependency chains: keep 3 copies of your data, on 2 different storage systems or media, with 1 copy offsite (ideally immutable). In cloud productivity suites like Microsoft 365, the key isn’t counting copies but ensuring those copies live in different failure domains with evidence you can take to an auditor.
What changes in the cloud
Classic 3-2-1 backup strategies were built around on-premises software solutions, and static infrastructure: one vendor, one appliance, and a remote vault. But with SaaS backups protecting cloud platforms like Microsoft 365, we introduce new dynamics that shift how risk is managed and how independence ... Read more
