DCCE | Industrial & Corporate

Hardened Microsoft tenants, from baseline to agents

Four stages that take a grown Microsoft environment from its Office 365 baseline to a controlled tenant in which AI agents can operate — with permissions, data access and evidence intact.

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Attacks on corporate IT increase by the day.
We make the environment they aim at defensible.

Attempts against corporate IT are growing in volume and, more importantly, in automation — probing identities, sharing links and misconfigurations around the clock and without a person behind each attempt.

We secure the environment they are aimed at, so that company data and information stay protected by configuration rather than by luck. Attackers are only one of four risks a grown tenant carries — the other three are already inside it.

The starting position


Why this matters

Most Microsoft tenants were not designed — they accumulated. Every acquisition, every new plant, every contractor engagement added identities, groups and permissions, and almost none of them were ever removed. Four risks grow out of that, and they are not the same problem in four costumes.

Risk · From outside

External attackers

The tenant, not the factory gate, is where an attack now begins. Identities are probed, sharing links are harvested and misconfigurations are found by automation that runs without a person behind each attempt. A legacy authentication path nobody switched off is a way in that no perimeter device will ever see.

Addressed in stages 01–03

Risk · From inside

Permission sprawl

Nobody granted the current state of permissions; it accrued. Administrator roles inherited from a project that ended years ago, a supplier account with no expiration date, a Teams site opened to the whole organization, a document library still shared with people who left. Data rarely escapes through a dramatic breach — it leaves through sharing that was never withdrawn.

Addressed in stages 01–02

Risk · Legal and contractual

Obligations you cannot evidence

Data protection law and the confidentiality agreements signed with customers, partners and suppliers both require the same thing: that you can show who had access to which information, and when. A tenant whose permissions cannot be reconstructed cannot produce that evidence — and the consequences of an unmet obligation are typically far more expensive than the work of being able to prove it.

Addressed in stages 02–03

Risk · Data sovereignty

Losing control of your own information

Confidential information now has a second way out: straight into an AI service, pasted or retrieved by an assistant that was never told which documents are off limits. And the exposure runs both ways — data an attacker can read is data an attacker can quietly alter, and a process driven by agents will act on that altered version without hesitating. Sovereignty means deciding what leaves, what stays, and being able to trust what comes back.

Addressed in stages 03–04

Where this comes from

Built to a defence standard, applied to industry

DCCE was established to help companies build and secure production in Europe — an environment where traceability, access control and protection requirements are not matters of discretion. Industrial and corporate environments face the same questions with less ceremony and, usually, more sprawl. This offering applies that standard to them: not more paperwork, but the same insistence that every access can be explained and every change can be evidenced.

The offering


Our approach: four stages

Each stage delivers on its own and prepares the next. Most organizations start at stage one whether or not they expect to.

Stage 01

Assessment & Baseline Hardening

Establish what the tenant actually looks like today, and close the openings that need no debate.

  • Full inventory of the tenant configuration as it stands
  • Comparison against Microsoft and CIS baselines, including Secure Score analysis
  • Legacy authentication paths switched off, multi-factor authentication enforced
  • Administrative roles reduced to those genuinely in use
  • Prioritized action list with effort and effect stated per item
  • Mobile Device Management (MDM)
  • Multi Application Management (MAM)
  • Secure File Exchange

OutcomeA documented baseline and a tenant that no longer fails on the obvious.

Stage 02

Identity & Zero Trust

Turn identity into a controlled entry layer — for offices, plants and external firms alike.

  • Conditional access architecture covering device, location and risk
  • Privileged access made temporary and subject to approval
  • Guest and supplier identities issued with an expiration date
  • Administrative accounts separated from working accounts
  • Break-glass procedure defined, tested and documented
  • Device Hardening
  • Secure File Exchange processes and solutions
  • SharePoint Hardening
  • Teams Hardening

OutcomeAccess that follows policy and can be explained, across every site.

Stage 03

Data & Threat Protection

Keep information where it belongs and make attacks visible while they are still cheap.

  • Classification and labeling of business-critical information
  • Oversharing in Teams and SharePoint identified and contained
  • Data loss prevention aligned to the classification, not bolted beside it
  • Endpoint and collaboration protection with central alerting
  • Retention and deletion rules that someone can actually operate
  • SIEM Concept
  • Setup
  • Configuration

OutcomeProtected data, a security operation that notices when something changes, and access you can evidence afterwards.

Stage 04

AI Agent Integration

Build one automated ecosystem of assistants and applications — under the same rules as everyone else.

  • Each agent given its own auditable identity and least-privilege rights
  • Agent data access bound to the classification from stage three — confidential material stays inside the agreed boundary
  • Defined approval and revocation process before an agent goes live
  • Every agent action logged and attributable after the fact
  • One governance model across Copilot, further assistants and connected applications

OutcomeAgents in productive use without giving up control, evidence or sovereignty over your data.

Stage four in detail


AI agents in a hardened tenant

The actual benefit

One governed ecosystem, not a collection of assistants

The value of agents is not a single chat window. It is an integrated, automated ecosystem in which Microsoft Copilot, Claude, ChatGPT and further applications work on the same processes, hand work to one another and operate under one set of rules — including which of them may see which data. A process that today passes through four tools and three manual handovers becomes one that runs end to end, with each step attributable.

That is where the return sits: processes become more robust because fewer of them depend on someone remembering a step, and more efficient because the routine part no longer waits for a person. The result is a company that responds faster than its competitors to the same demand — on a foundation that a security officer can still sign off.

  • Microsoft Copilot
  • Claude
  • ChatGPT
  • Line-of-business applications
  • Further models on request

Governed adoption of Microsoft Copilot and agents

An agent sees what its user can see. Introducing Copilot into a tenant with unresolved permissions does not create a new problem — it makes the existing one instantly retrievable.

  • Permissions cleaned up before an agent inherits them
  • Data access scoped deliberately rather than by default
  • Oversharing closed off at the source, not filtered afterwards
  • Usage logged in a form that can be reviewed and reported on

DCCE security agents

Once the tenant is hardened, keeping it that way is continuous work. Our own agents take on the parts of that work that do not need a person.

  • Continuous checking of the hardening state against the agreed baseline
  • Correlation of security signals into findings worth reading
  • Reporting prepared for management and for audit
  • Response steps prepared and staged for human approval

All of this rests on stages one to three. An agent ecosystem placed on an unhardened tenant inherits its weaknesses and accelerates them.

The result


What you get

  • A dependable identity layerWho may enter, from where and for how long is defined by policy rather than by history.
  • Permissions you can explainEvery entitlement has an owner, a reason and an end date — including the ones held by agents.
  • Evidence, not assurancesA written record of what was changed, when and why — and of who could reach which information. The answer a customer, an auditor or a supervisory authority asks for exists before they ask.
  • AI you are allowed to useAgent adoption that a works council, a legal department and a security officer can each approve on their own terms.
  • Processes that run end to endWork moves between assistants and applications without manual handovers — more robust because it no longer depends on someone remembering a step.
  • A repeatable audit trailThe same checks run again next quarter and produce a comparable result, without rebuilding the exercise.

Engagement


How we work

01

Assess

We assess before we propose. The first stage produces a picture of the tenant as it is, and that picture decides what follows — not a fixed package.

02

Deliver

Delivery runs stage by stage, each one closed out and documented before the next begins. You can stop after any stage and still hold something complete.

03

Operate

Operation afterwards is optional. Some organizations take the hardened tenant back in house; others leave the continuous checking with us.

Assessment, engineering, security and operation — everything from one source.

Contact


Talk to our team

Tell us where your tenant stands today — we will tell you which stage you are on. A first conversation is usually enough to establish that, and it does not require preparation on your side.

DCCE GmbH
Moritzburger Straße 18, 01445 Radebeul, Germany
Contact us DCCE - INDUSTRIAL & CORPORATE