Rethinking 3-2-1 Rule For Microsoft 365 Backup: Two Engines, One Outcome
Veeam, Thursday, November 6th, 2025
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.