Microsoft 365 PowerShell Admin Library

I built an internal PowerShell library for ongoing Microsoft 365 administration and monthly compliance review. It turns the identity, security, Defender, Intune, Teams, SharePoint, and audit checks that matter into repeatable, logged operations instead of a manual trip through admin portals.

What it covers

• Licensing: license auditing, license usage trends, unused-license reclamation.
• Mailboxes: mailbox sizing, external forwarding detection, mailbox database inventory, room mailbox usage.
• OneDrive / SharePoint: OneDrive usage, SharePoint external sharing, SharePoint site collection inventory, hub-site inventory.
• Audit: unified audit log search, advanced message trace, journaling/archiving, mail-flow rules.
• Identity: MFA status, risky sign-in detection, guest user auditing, privileged role assignments, Azure AD app registrations, service principal permissions, hybrid AD Connect.
• Security: Conditional Access policy inventory, Defender for Endpoint device reporting, Defender attack-simulation inventory, Identity Protection, Microsoft Secure Score, EOP advanced config, Information Protection, Cloud App Security, Azure AD PIM, Azure AD Access Reviews, Azure AD Entitlement Management.
• Teams: meeting attendance, channel analytics, voice/calling, external access, app permissions, lifecycle, policy inventory.
• Intune: configuration profiles, MDM reporting, app inventory.
• Compliance: communication compliance, insider risk, information barriers, Compliance Manager assessments, Viva Insights adoption, M365 usage analytics, M365 group expiration.
• Other: spam/malware reporting, Power Platform DLP, network connectivity, backup policies, service health incidents, Azure AD B2B collaboration, Azure AD authentication methods.

Engineering conventions

• Every script is documented for reuse: synopsis, parameters, examples, prerequisites.
• Parameterized for multi-tenant work where the cmdlets allow.
• Error handling and structured logging built in, not bolted on.
• Built on Microsoft Graph PowerShell, Exchange Online PowerShell, and SharePoint PnP modules.