M365 Admin Tools - Free Microsoft 365 Utilities for IT Administrators

Free utilities for Microsoft 365 administrators and managed service providers: license cost calculator, mailbox size planner, Exchange transport rule generator, PowerShell command builder, DNS & email delivery tools, Conditional Access policy builder, Bicep builder for Azure, tenant health dashboard, and quick links to every Microsoft 365, Azure, and security admin portal.

Admin Tools

Admin Portal Links — Quick links to all Microsoft 365, Azure, and security admin portals.
License Cost Calculator — Estimate M365 licensing costs across plans with annual/monthly comparison.
License Comparison Matrix — Compare Microsoft 365 plans side by side — features, security, storage, and pricing across Business, Enterprise, and Frontline.
DNS & Email Delivery Tools — Check MX, SPF, DMARC, DKIM, blacklists, and email health.
Exchange Rule Generator — Generate transport rule PowerShell commands with a visual builder.
PowerShell Command Builder — Build common M365 PowerShell commands with parameters and output options.
PowerShell Scripts for Admins — Ready-to-use PowerShell scripts for common M365 tasks.
DDG Recipient Filter Builder — Visually build recipient filter strings for Exchange Online Dynamic Distribution Groups.
Conditional Access Policy Builder — Visually build Azure AD Conditional Access policies and generate Graph PowerShell commands.
Tenant Health Dashboard — Interactive security checklist to assess your M365 tenant against best practices.
Bicep Builder for Azure — Visually compose Azure resources and generate a deployable Bicep template.
Mailbox Size Planner — Project Exchange Online storage growth and identify capacity risks.
M365 & Azure Error Code Lookup — Searchable database of 200+ error codes (NDR, AADSTS, Intune, Azure) with plain-English causes and fixes.
Cloud Service Map — Azure vs AWS vs GCP — Side-by-side mapping of Azure, AWS, and Google Cloud services across compute, storage, networking, databases, identity, and AI.
Articles — Guides, tips, and best practices for Microsoft 365 administrators.

Latest Articles

How to Use the Bicep Builder: A Practical Guide — A walkthrough of the Bicep Builder tool: what it does, how to use it step by step, and trade-offs to be aware of.
Migrating On-Premises MS Infrastructure to M365 - PART 3 - Cutover, Hardening & Decommission — DNS cutover, Conditional Access replacing Group Policy, Defender for Endpoint, Exchange and AD DS decommissioning.
Migrating On-Premises MS Infrastructure to M365 - PART 2 - The Migration — Step-by-step execution of an on-premises Active Directory migration to Microsoft 365 and Azure.
Migrating On-Premises MS Infrastructure to M365 - PART 1 - Planning & Assessment — How to plan and assess an on-premises Active Directory migration to Microsoft 365 and Azure.
Migrating Google to M365: All You Need to Know — The complete step-by-step guide for migrating from Google Workspace to Microsoft 365.
Top 10 Tasks Every Admin Should Automate — The 10 tasks every Microsoft 365 administrator should automate with PowerShell, with ready-to-use scripts.
PowerShell Reference Guide — A comprehensive Microsoft 365 PowerShell command reference for IT admins and MSPs.
IaC: How to Deploy Azure Tenant Spaces with a Template Using Bicep — Deploying production-ready Azure Landing Zones using Infrastructure as Code with Bicep and Azure CLI.
Microsoft Admin PowerShell Modules — Setup Guide — Setup guide covering all major Microsoft 365 admin PowerShell modules.
Decommissioning On-Premises MS Exchange Servers after an Office 365 Migration — The supported process for decommissioning on-premises Exchange servers after a migration to Exchange Online.