The useful choice is not simply Copilot or custom AI. Microsoft 365 Copilot can assist people inside their work, while Copilot Studio and Power Platform can support agents and connected processes. A custom application is another option when supported platform capabilities do not meet the requirements. Evaluate all three against the actual workflow.
Three Delivery Patterns
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| Pattern | Typical fit | What must be designed |
|---|---|---|
| Microsoft 365 Copilot productivity | Reviewed drafting, summaries, and assistance in supported Microsoft work | Licensing, source permissions, content quality, adoption and review |
| Microsoft-native automation and agents | Supported approvals, connectors, low-code applications, and agent workflows | Copilot Studio or Power Platform capacity, permissions, business rules, exceptions, and operating ownership |
| Custom AI application or integration | Requirements not well served by supported products or connectors | Application authorization, retrieval, orchestration, evaluation, deployment, and maintenance |
Copilot Chat, Microsoft 365 Copilot, Copilot Studio, and Power Platform do not have interchangeable entitlements. Confirm the specific features, connectors, users, and consumption model. See Microsoft’s overview and the product licensing terms before committing.
Separate Assistance from Execution
Illustrative example: a team needs a summary of an approved customer record. Productivity assistance may satisfy that need after human review. If the process must update the CRM, route an exception, obtain approval, and notify operations, evaluate supported Microsoft automation before assuming a custom build is necessary.
A chat-based agent can also perform governed actions. Its interface does not determine the control strength. Inspect the implemented authorization, approval checks, tool permissions, retry behavior, and recovery path.
Apply Hard Requirements First
- Which system remains authoritative for each record?
- Can the selected product enforce the required user and tool permissions?
- Are integrations supported, licensed, and maintainable?
- Can sensitive or irreversible actions be held for approval?
- Can operators reconcile a partial failure without duplicate writes?
- Who owns changes, cost, incidents, and exit or data export?
Eliminate any option that cannot meet a hard requirement. Do not award custom software an automatic governance advantage: the team must build, test, and operate those controls. Equally, do not assume an existing Microsoft subscription covers the proposed workflow.
Pilot the Highest-Risk Assumption
Use representative allowed and denied users, approved sources, missing fields, failed tools, and repeated requests. Measure useful task completion, review effort, unsupported output, exceptions, and cost. Agree stop conditions and ownership before broad rollout. A hybrid approach may use productivity assistance alongside Microsoft-native or custom process execution.
Compare Microsoft Copilot services, workflow automation, and the build, buy, or integrate decision worksheet.