In every Microsoft 365 tenant we look at, there are two people who have been losing the same argument for a decade.

One is in IT. They watch the storage line on the invoice grow every quarter, and they know, with the precision that only someone who has actually run a SharePoint migration can know, that most of what is being paid for is not used, not needed, and not even remembered.

The other is in Legal, Compliance, or Records. They have read the regulation. They know that the difference between a defensible answer and a regulatory finding is whether the document is still there when someone asks for it, seven, ten, or twenty-five years later.

Both are right. That is the problem.

The Debate Nobody Has Won

The IT case is not theoretical. Microsoft 365 ships generously: 100 GB per Exchange mailbox, 1-5 TB per OneDrive, and a tenant-pooled SharePoint allowance of 1 TB plus 10 GB per licensed user. That sounds like a lot. It is not.

In a 2,000-employee organization with typical collaboration patterns, the SharePoint pool is exhausted within 3 to 4 years. Every additional terabyte is billed at roughly USD 0.20 per GB per month, about USD 2,400 per year, per terabyte, before backup. With backup (and most regulated organizations are now contractually obligated to back up M365), the bill doubles. A modest 50 TB of overflow amounts to USD 240,000 per year in recurring spend that nobody actively decided to commit to.

And it compounds. Industry data consistently puts annual growth in unstructured data at 25%-40%. At 30% growth, your environment doubles every 2.6 years. The line on the invoice is not linear; it is a curve.

Meanwhile, nobody is cleaning up. The honest reason is not laziness. It is the people who could clean up, the employees who created the files, who have moved on, changed roles, left the company, or simply forgotten what is in the folder they made in 2018 for a project that ended in 2019. IT cannot delete it because IT does not know what it is. Industry analysts repeatedly estimate that more than half of enterprise data is dark, never accessed, never classified, never reviewed. Quality is not a criterion. Volume is.

So IT looks at this and says: archive aggressively, save the money, reduce the attack surface.

And then Legal walks into the room. The regulated industries know this intimately. In healthcare, a clinical trial protocol or device design file may carry a retention obligation of 15 to 30 years. In manufacturing, the supplier’s email explaining why a tolerance was changed in 2014 is exactly the document that determines a class action in 2031. In any sector covered by GDPR, Law 25, or export control regimes, the obligation is not optional, and the penalty for a gap in the record is not theoretical.

This is why the debate has never been won. IT is not wrong about cost. Compliance is not wrong about risk. They are arguing about the same data from two different sides of a budget.

And while they argue, the storage line keeps growing.

Microsoft 365 Archive Just Ended the Argument

In 2024, Microsoft introduced Microsoft 365 Archive: a cold storage tier built directly into SharePoint, where archived sites stay in the tenant, remain searchable, remain in scope for eDiscovery and Purview retention, and cost roughly a fraction of active storage.

Compliance keeps every byte. The archived sites stay inside the tenant, indexed, discoverable, in scope for eDiscovery and Purview retention, under the same legal hold as before. Nothing is deleted. Nothing migrates to a third-party vault that needs to be re-litigated at every renewal. IT pays a fraction of the price, with rehydration on demand and fully auditable when a regulator or litigator actually asks.

That is, on paper, the end of the argument. The CFO gets a smaller invoice, the CISO gets a smaller attack surface, the General Counsel gets a defensible record, and the auditors get a clean retention story.

Except a question has just been quietly handed back to IT, and it is harder than the one they thought they were solving.

The Question No Tool On Your Tenant Can Answer

The new question is not whether to archive. It is what to archive.

And here, every existing IT tool fails, not because the engineering is bad, but because the question is the wrong shape for an admin console.

The default IT answer is the last-activity report. Pull a list of every site, document, and folder that has not been opened in 18 or 24 months and recommend it for archive. It is fast, it is auditable, it produces a number for the steering committee.

It is also wrong, in both directions, in ways that cost real money and real risk.

A master service agreement signed in 2019 has not been opened in three years. It is also the document that defines the indemnity terms on a contract that runs until 2031. Inactive is not the same as inert.

A clinical study protocol from 2020 has not been touched since the trial closed. It is also the document a regulator will ask for in a 2027 inspection. Inactive is not the same as expendable.

Conversely, a SharePoint site that is hammered with traffic every day might be full of duplicated drafts, expired pricing, and personal scratch files that should never have existed in the first place. Active is not the same as valuable.

Only the data owner can answer the question.

The contract manager knows which SharePoint site still hosts live agreements and which is legacy. The R&D engineer knows which Team holds the current production reference and which was spun up for an abandoned initiative. The project lead knows whether a 2022 site is still the source of truth for warranty claims or simply forgotten sprawl. None of those people will ever open the SharePoint admin center. The compliance console was built for the compliance team. The retention policy engine was built for the policy author. Nothing in the standard M365 toolkit is built to ask 2,000 employees a specific, contextual question about data they actually own.

That is the gap. And until it is closed, the storage stalemate has just been replaced by a classification stalemate. The data sits in active storage, paying full price, because nobody can produce a defensible answer about what should move to archive, and IT, quite reasonably, will not move data into a different retention posture on a guess.

The question Microsoft left unanswered

WeActis was built for exactly this gap. It is a Microsoft Teams app that connects to your M365 environment, surfaces the data each employee actually owns, and asks them the only question that matters: is this still business-relevant, or can it move to archive? Microsoft has solved the economic argument. The cold tier exists, compliance is preserved, the invoice is smaller. What Microsoft did not ship is the mechanism to decide what actually belongs there.

The data owner answers in the context they already work in, in two minutes, on data they actually recognize. IT receives a clean, defensible archive decision tied to a named human and a timestamp. Compliance receives continuous evidence that retention is an operating process, not a policy document. The CFO sees the storage curve bend for the first time in a decade.