MC1477185 Brings Metered Billing to OneDrive for Business
Microsoft announced the option in Message Center post MC1477185, first covered for consumer tech readers by Neowin. Microsoft's text says the company is introducing a pay-as-you-go, consumption-based billing option for additional OneDrive storage. The option lets administrators allow selected OneDrive accounts to exceed their licensed storage quotas when needed, while helping organizations control which users can consume additional storage. The post is tagged as a major change and tracked as Microsoft 365 roadmap item 562352. Office 365 for IT Pros dates it to 22 September 2026.
The rollout schedule has two stages. The public preview of this feature is available now to all commercial tenants. For general availability across Worldwide, GCC, GCC High and DoD, rollout begins in early November 2026 and is expected to complete by early December 2026. Microsoft's Learn documentation says the product entered public preview in July 2026. So the September post announces a GA date for a preview that was already running, not a new test.
Microsoft says the change affects Microsoft 365 commercial tenant administrators who manage OneDrive storage and organizations with OneDrive users approaching or exceeding their licensed storage quotas. Every document about this service describes it as a tenant-admin feature. None of them announces anything for consumer OneDrive accounts under Microsoft 365 Personal or Family, so home users should not expect this billing option.
How Microsoft 365 OneDrive Storage Bills Only the Overage
The billing works like this. Microsoft Learn says that when you set up pay-as-you-go billing, you can set a storage limit that's higher than the licensed quota. The maximum value remains at 25,600 GB. Only the storage usage above the licensed quota is billed. Microsoft's overview of pay-as-you-go services puts it the same way: the service lets organizations extend OneDrive storage beyond licensed limits and pay only for storage consumed above their included quota.
You pay for storage used, not for the limit you set. Microsoft's Learn FAQ gives an example: a user with a 1 TB licensed quota has their limit raised to 3 TB. Their OneDrive can now grow to 3 TB, but billing covers only what they use above 1 TB. If they store 1.5 TB, 0.5 TB is billable. The higher limit is a ceiling, not a purchase.
This also isn't a way to buy OneDrive storage from zero. The licensed quota that comes with each user's Microsoft 365 plan is still the base. Pay-as-you-go only covers usage above it.
Microsoft's own documents don't give a price. Office 365 for IT Pros describes it as a metered $0.20/GB/month billing option that's available in preview for all tenants now. The Topedia blog says costs are the same as for SharePoint PAYG Storage, which is Microsoft's matching pay-as-you-go service for SharePoint sites. At the reported rate, a user sitting 500 GB over their license would cost about $100 a month. That figure is our own calculation from the reported price, not a Microsoft quote. Check the rate on your billing policy before you commit.
The Setup Runs Through Azure
The prerequisites show who needs to be involved. The service is billed through Azure, so Microsoft Learn says you must have an Azure subscription and resource group. You must have the Owner or Contributor role to an Azure subscription and a resource group linked to the same Azure subscription. In the Microsoft 365 admin center, you also need the SharePoint Administrator or Global Administrator role. Microsoft recommends using the least-privileged role and says Global Administrator should be kept for emergencies.
In many organizations, the person who manages OneDrive quotas doesn't own an Azure subscription. Setting this up may mean a conversation between the collaboration team and whoever controls Azure spending.
The documented setup has three stages:
- Confirm an Azure subscription and a resource group linked to it, with Owner or Contributor rights on both.
- In the Billing section of the Microsoft 365 admin center, follow the pay-as-you-go setup flow. At "Step 4. Review and create the billing policy," select the Microsoft 365 OneDrive Storage service.
- After billing is connected, edit the OneDrive storage limit for each user who needs more space, up to 25,600 GB.
One sentence on the Learn page mentions SharePoint Storage in the OneDrive setup section. That looks like a copy-over error. The step that matters says to select Microsoft 365 OneDrive Storage when you create the billing policy.
Before connecting, set up cost controls. Microsoft points admins to pay-as-you-go budgets, which let you monitor usage and receive alerts as costs approach defined thresholds. A budget is the only documented spending alert for this service.
"Selected Users" Is Controlled by Quotas
Microsoft's announcement says admins can pick which accounts use the extra storage. Two independent write-ups describe how that works in practice, and the details affect billing.
Topedia reports that administrators cannot assign the OneDrive PAYG billing policy to individual user accounts. This policy applies to all OneDrive accounts in the organization. In that reading, you choose users by raising specific users' storage limits, not by attaching the policy to them. Office 365 for IT Pros describes it differently, saying the PAYG agreement can be limited to specific accounts or apply to all accounts in the tenant. Both agree on the practical point: the storage limit you set on each account is what decides how far that user can grow.
Topedia also warns that if OneDrive storage is above the limit, OneDrive PAYG billing applies once a policy is configured. If accounts in your tenant are already over their licensed entitlement, connecting the service could start charges for them straight away. We found no other source confirming this, so treat it as a reason to audit before connecting, not as settled fact.
Turning the service off has a documented effect. Microsoft Learn says that if you disconnect while OneDrive accounts are over their licensed quota, enforcement of the quota resumes. Users you allowed to grow would be back under quota enforcement as soon as billing is disconnected. Plan how data will be reduced or moved before you disconnect.
Where Pay-as-You-Go Fits Against OneDrive Extra Storage Packs
The existing option is still available. Organizations can buy OneDrive Extra Storage in the Microsoft 365 admin center as capacity packs in 100 GB, 500 GB and 1 TB through 6 TB sizes. Each pack is assigned to one licensed user like any other add-on license. You can unassign, reassign or cancel packs, but a pack can't be split between users. If you've set a lower storage limit on a user, you have to raise it separately before they can use the pack. Both models share the same cap of 25 TB per user. Office 365 for IT Pros notes that in either case, a single user cannot exceed 25 TB of OneDrive storage.
The management tool AdminDroid explains where packs fall short: a user might need only 200 GB more, and if the required capacity doesn't match the available pack, the admin needs to purchase the entire pack, even if the user doesn't use all of it.
| OneDrive Extra Storage packs | Microsoft 365 OneDrive Storage (pay-as-you-go) | |
|---|---|---|
| Purchase model | Fixed packs: 100 GB, 500 GB, 1–6 TB | Metered usage above the licensed quota |
| Assignment | One pack per licensed user, not splittable | Admin raises individual users' storage limits |
| Billing prerequisite | Microsoft 365 billing roles (MCA or MOSA) | Azure subscription, resource group, Owner/Contributor role |
| Per-user cap | 25 TB total | 25,600 GB limit |
| Status | Generally available | Preview; GA November–December 2026 |
The trade-off is predictable cost versus paying only for what you use. A pack is a known subscription cost that shows up in normal Microsoft 365 billing. Metered billing avoids paying for space nobody uses, but the bill rises and falls with user behavior and goes through Azure. None of these sources compares a pack price to the metered rate, so we can't say which is cheaper for a given amount of usage. Run that comparison against your own quotes.
Stricter Quota Enforcement Makes the Option More Urgent
The timing is linked to another OneDrive change. According to Office 365 for IT Pros, Microsoft is forcing customers who benefited from a perfectly valid expansion process to clean up their OneDrive accounts, while launching pay-as-you-go at the same time. The publication calls the combination of clawing back storage from some customers and launching a PAYG offer to sell them more OneDrive storage "odd". It says the related notice, MC1465765, went only to affected tenants and doesn't appear on public Message Center archives. An earlier WindowsForum report described tighter enforcement of license-based quotas, with over-limit accounts becoming read-only until the storage problem is resolved.
For tenants that had accounts expanded above their license entitlement under the old process, pay-as-you-go is one way to keep those accounts writable without moving data. It's also a new cost for storage those tenants may have thought was already included. If you got MC1465765, look at the two notices together.
Government and Education Tenants Face Different Timelines
Availability varies by cloud. The Message Center post lists Worldwide, GCC, GCC High and DoD for general availability. The Learn page, last updated in June, says the product is not currently available to education, GCC, or Microsoft 365 customers operated by 21Vianet in China, as Topedia also reports. Taken together, the preview is for commercial tenants now, government clouds are on the GA list for November, and neither education tenants nor 21Vianet appear on any announced schedule. Government tenants should wait for GA to reach their cloud rather than assume they can use the preview today.
What This Means for Admins Managing OneDrive Quotas
If you have no users near their OneDrive quota and no over-quota accounts, you can ignore this. Microsoft says no action is needed if you don't want pay-as-you-go storage. If you manage large-file users such as video, CAD, research or legal teams, or your tenant received enforcement notices, now is the time to decide between packs and metered billing, before the November GA.
- Before connecting any billing policy, run a report of OneDrive accounts near or above their licensed quota. One independent report says existing overages may become billable as soon as the policy is in place.
- Line up an Azure subscription and resource group, and someone with Owner or Contributor rights, early, because this billing runs through Azure, not the usual Microsoft 365 add-on checkout.
- Raise storage limits only for users who need them, and create a pay-as-you-go budget with alerts before usage grows.
- Compare your metered cost at the reported $0.20 per GB per month with the price of the nearest OneDrive Extra Storage pack for each heavy user. Packs may still win for steady, predictable usage.
- Treat disconnecting as a planned change, because quota enforcement resumes on accounts that are still over their licensed limit.
- If you're in education, 21Vianet or a government cloud, wait for GA in your environment instead of planning around the commercial preview.
Microsoft is moving OneDrive for Business toward metered billing for overage: licensed quotas are enforced more strictly, and space beyond them is billed by the gigabyte through Azure. The preview is open to commercial tenants now, and GA from early November to early December 2026 will bring it to government clouds. Before then, admins with heavy users need to decide which of them get a higher limit, set up a budget, and make sure the Azure paperwork is in place.