# Overview

- Entra ID (formerly Azure AD) - PAAS
- Exchange Online - PAAS (Admin side) & SAAS (User side)
- Sharepoint Online - Paas (Admin side) & SAAS (User side)

- Intune (MDM) - Mobile Device Management, Across multiple OSs (Android, Windows, etc)
- SCCM (Older) - Windows only, Group Policy

Main system - Microsoft 365 - Sits on top of Azure

- Microsoft 365 - PAAS & SAAS
- Azure - IAAS

[![image.png](https://note.human-bean.net/uploads/images/gallery/2026-07/scaled-1680-/P3zimage.png)](https://note.human-bean.net/uploads/images/gallery/2026-07/P3zimage.png)

Microsoft Cloud

- Blue - Microsoft 365
- Red - Azure Infrastructure
- Purple - Microsoft 365 & Azure both share Entra ID (directory services)

Cloud Sync - SSO logs users in via on-prem D.C, and Entra ID via cloud (syncs out but not in)

- Entra Connect server (formerly Azure AD Connect) - link on-premise with cloud services
- Entra ID Sync (light weight version)