For years, the standard answer for any regulator, inspectorate or oversight body that needed to manage complex casework was to buy a specialist product. A dedicated legal-and-regulatory case-management platform, hosted by an external provider, configured once and lived with for a decade. It worked. But a growing number of regulated organisations are now asking a different question: why is our most sensitive operational data sitting in someone else's system, on someone else's roadmap, behind someone else's renewal terms - when we already own an enterprise-grade platform capable of running it?

That platform is Microsoft 365. And the shift towards rebuilding case management natively - on Power Platform, SharePoint and Dataverse, inside an organisation's own tenant - is now one of the clearest patterns in public-sector technology.

The direction of travel is not marginal. Gartner's analysis indicates that 75% of new applications developed by enterprises will use low-code or no-code technologies, and the case-management software market itself is expanding rapidly - valued at around USD 8.26 billion in 2024 and forecast to reach USD 24.09 billion by 2034, with public sector modernisation and the need to move away from legacy case systems named among the primary drivers.

The appeal is easy to understand. Switching a legal document and case estate onto Microsoft 365 can retire expensive legacy licences while improving findability, compliance and auditability - managing case-related records, emails and documents together, under regulatory-grade retention and access controls, in tools staff already use every day.

But the prize is only worth having if the move itself is handled properly. Replacing a business-critical regulatory system is not a software project; it is a transition of a live service that cannot afford to drop a single open case. Below is the playbook we apply.

Start with the operating model, not the technology

The most common failure in these programmes is treating them as a build. The quality of the operating model - roles, permissions, document metadata, case-status definitions, quality-control tiers and acceptance rules - determines whether the application succeeds. Get the information architecture right and the configuration is straightforward. Get it wrong and no amount of clever development will save it.

So the first phase is discovery, not development. Map how cases actually flow today: the simple single-tier review, the multi-stage quality-control route, the exceptional case escalated to a senior adviser. Document the record relationships - cases to organisations, contacts, issues, documents, findings and outcomes. Agree what "closed" means, what must be immutable, and who is allowed to see what. Only then do you design.

Treat data and documents as one governed model

Regulated casework lives in two places at once: structured records and the documents that evidence them. In a legacy specialist system these were bolted together by the vendor. In a Microsoft 365 build, you design that relationship deliberately - Dataverse for the structured case record, SharePoint for the documents, joined by agreed metadata, versioning, permissions and templates.

Done well, this is a genuine upgrade rather than a like-for-like move. Case data and documents become one controlled information model, so a reviewer finds the current, correct evidence in seconds while the organisation retains a defensible history of who did what, when. This is also where document generation earns its place: key templates produced automatically from case data, consistently formatted, with the approval points built in.

Design governance and auditability as first-class features

Regulated bodies carry a particular exposure. Poor record-keeping is no longer a housekeeping problem - it is a financial and reputational one. Corlytics reported that inadequate documentation and poor retention practices contributed approximately USD 238.5 million in global regulatory fines in 2025. An organisation whose own remit is to hold others to account cannot afford weak evidence trails in its core system.

The reassuring shift here is in how governance is now understood. It has moved from a centralised IT control function that slows everyone down to a shared strategic enabler - with the emphasis firmly on maintaining security and compliance without throttling delivery. In practice that means designing role-based access, data-loss-prevention and environment strategy, tiered review with recorded comments and responses, and immutable activity history from day one - not adding a dashboard at the end and calling it assurance.

Plan the exit before you plan the build

The single most important document in a transition is the one nobody wants to write first: the exit and migration plan for the system you are leaving. Confirm your data export rights, formats and document links in week one. Engage the incumbent provider early - access and export delays are the most predictable cause of a slipped go-live. Profile a sample of real cases and documents during discovery, so nasty surprises about data quality surface in September, not the week before cutover.

And migrate what matters. In most regulatory transitions there is no need to lift a decade of closed history on day one; the priority is the active open caseload and its associated documents, migrated cleanly, reconciled and verified. Historic records can be addressed on a separate, lower-risk track.

Build for ownership, not dependency

There is a quiet irony in leaving a legacy vendor only to become just as dependent on your implementation partner. The point of moving into your own tenant is to own the outcome. That means the organisation's administrators should be practising controlled configuration and release activities during delivery - not receiving a manual at the end. It means architecture decision records, a configuration register, source-controlled solutions, runbooks and a prioritised improvement backlog handed over as standard.

This is where a structured readiness approach pays for itself. VE3's Power Platform Centre of Excellence Readiness Framework assesses the eleven domains - from licensing, governance and security through to data, automation, application lifecycle management, support, skills and adoption - that determine whether a build will be safe, supportable and genuinely owned once the consultants leave. The maturity gap is real and measurable: mature Centres of Excellence are associated with materially faster solution delivery and stronger security and compliance outcomes.

The bottom line

Retiring a specialist case-management system for a Microsoft 365 build is not about chasing a trend. It is about putting your most sensitive operational data back under your own governance, on a platform you already pay for, with the audit trail a regulator need and the ownership a public body deserves. The technology is proven. The discipline is what separates a smooth transition from a painful one.

VE3 designs, builds and transitions regulatory case-management solutions on Microsoft 365 and Power Platform, with a fixed-price, own-it-outright delivery model. Talk to our Power Platform team about your transition.