Microsoft 365 tenant architecture and governance

The documented architecture and governance of the Microsoft 365 estate. This is the reference layer that every identity, security, and automation decision builds on: how identity is structured, how access is controlled, what is licensed and why, and how each workload is configured.

Identity governance

• Entra ID structure. Groups, admin roles, and authentication methods, with the group taxonomy anchored on standardized attributes so dynamic membership, licensing, and policy scoping all key off the same source.
• Privileged Identity Management. Just-in-time elevation for admin roles with periodic access reviews.
• App and enterprise-app inventory. App registrations and enterprise-app SaaS integrations documented, plus external-identity handling.

Access control

• Conditional Access design with named locations, covering device compliance, location, and risk-based sign-in across the estate.
• Least-privilege scoping so access is granted narrowly and reviewed rather than accumulated.

Licensing and workloads

• Licensing model mapped to SKUs, so entitlements and cost are understood rather than guessed.
• Workload configuration documented across Exchange Online (mail flow and connectors), Teams (including voice and resource accounts), SharePoint, OneDrive, and Power Platform.

What this demonstrates

• Governing a tenant as a system identity, access, licensing, and workloads treated as one documented, coherent architecture rather than a pile of point settings.
• The foundation under everything else the automation, security, and reporting work all depend on this layer being deliberate and written down.