Microsoft 365 storage economics

The questions admins actually ask about SharePoint and OneDrive storage costs, answered with Microsoft's own numbers and sources.

OneDrive · Licensing

OneDrive for Business Plan 2 is being retired: what "unlimited" actually was, and what to move where before January 2027

No renewals after January 2027, end of service December 2029. The 1 → 5 → 25 TB ladder, the read-only trap on licence swap, and a four-bucket triage against the real meters ($0.20 active, $0.05 archive).

17 September 2026 · 8 min

OneDrive · Billing

Unlicensed OneDrive billing: what Microsoft actually charges, and the decision you must make before day 93

The archive meter is tenant-wide: one reactivation turns on $0.05/GB/month for every archived unlicensed OneDrive. The timeline, the two meters, the retention-hold trap, and the three options per account.

10 September 2026 · 7 min