MS-100 Study Guide: Microsoft 365 Identity and Services

My MS-100 Study Guide is designed to help you prepare for the MS-100 Exam by answering difficult questions you would not know the answers to without already taking the exam and helping you create a solid study plan. From someone who has successfully passed the exam… twice!

By the end of the guide, you will be well on your way to booking the MS-100 exam and passing, with a shiny new badge to your name. To add a little context to this post, I took the exam first in 2021, then in early 2022 and have ensured all the information contained in the MS-100 Study Guide is relevant for the current date.

This study guide has been updated for the May 3rd 2022 exam update.

About the MS-100 Exam

The MS-100 exam is aimed at individuals to manage many services within their Microsoft 365 tenant at an enterprise level. Here is a snippet of the description from the ‘Schedule exam’ page:

“Candidates for this exam are Microsoft 365 enterprise administrators who take part in evaluating, planning, migrating, deploying, and managing Microsoft 365 services. They perform Microsoft 365 tenant management tasks for an enterprise, including its identities, security, compliance, Power Platform, and supporting technologies.

Candidates have a working knowledge of Microsoft 365 workloads and should have been an administrator for at least one Exchange, SharePoint, Teams, or Windows 10 deployment. Candidates also have a working knowledge of networking, server administration, and IT fundamentals such as DNS, Active Directory, and PowerShell.”

The MS-100 exam is part of the requirement to earn the Microsoft 365 Certified: Enterprise Administrator Expert certification, which is a well sought after certification for both engineers and employers.

MS-100 Exam requirement

How is the MS-100 Exam weighted?

  • Design and implement Microsoft 365 services (25-30%)
  • Manage user identity and roles (25%-30%)
  • Manage access and authentication (15-20%)
  • Plan Office 365 workloads and applications (25-30%)

How can I prepare for the MS-100 Exam?

How to prepare:

  1. Review the MS-100 exam skills outline document. The skills outline should be your first task when preparing for the MS-100 exam. The official Microsoft document lists all the skills you will be questioned on during the exam. Use this to identify any weak areas where you can focus your study.
  2. Work through the MS-100 Microsoft Learn collection. The Microsoft learn collection contains all the learning paths and modules to best prepare you for the MS-100 exam. Offered directly from Microsoft, for free. You will be giving informational text, case studies, exams and labs all from the Microsoft learn website.
  3. Use a trial tenant to practice and gain hands-on experience! Gaining hands-on experience is often the most superior way for you to retain the knowledge you have read about. Better yet, a great tip is to use this experience on your CV once you have passed the exam!
  1. Ask your peers or colleagues! Sometimes to best motivate yourself and receive encouragement is to speak to the people you work closely with every day. Ask them if they have taken the exam and if not, maybe start a study group.
  2. Get familiar with how the exams are formatted with the Microsoft Exam Sandbox. This short demo exam will help you become familiar with how the exams are formatted and the different styles of questions that will be used.
  3. Join our community on Reddit! r/azureexam. Join our community on Reddit and post any question you like. It is the perfect place to ask recent exam takers for their advice and understand their exam experience.
  4. Book the exam and set yourself a realistic deadline. Book the exam! make sure you give yourself a target to work toward and ensure it is hard to set in your diary. Fit it around your home life, book it in your work calendar and give yourself at least 30 days to study.

How long should I study for the MS-100 exam?

You should aim to study for at least 1 hour a day for a minimum of 30 days. Of course, you can study more than this, or less. But this is will provide you with a solid foundation going into the exam. 

The exam material is broken down into 4 sections, try to dedicate 1 section per week.

Is the MS-100 a hard exam?

The MS-100 exam is part 1 of 2 exams required to earn the Microsoft 365 Certified: Enterprise Administrator Expert certification. This being an expert-level certification, it is normal to find the exam quite hard. 

It is important to ensure you have a solid study plan and feel confident going into this exam. The criteria for passing are standard for Microsoft exams however the content covers a wide array of Microsoft 365 services that you need to know about.

How many questions are in the MS-100 exam?

The MS-100 exam will consist of between 40 and 60 questions. Usually, around 30-40 are multiple-choice, drag and drop or fill in the blank style questions. around 5 are yes/no style questions and the remaining questions are case studies.

How long is the MS-100 exam?

The MS-100 exam will have a total duration of 180 minutes. You will be able to check-in 30 minutes before your exam also to complete the check-in process.

Are there labs in the MS-100 exam?

Currently there are no labs in the MS-100 exam.

MS-100 Study Guide: Microsoft Docs


Plan Architecture

Deploy a Microsoft 365 tenant

Manage Microsoft 365 subscription and tenant health

Plan migration of users and data


Design identity strategy

Plan identity synchronization

Manage identity synchronization with Azure Active Directory (Azure AD)

Manage Azure AD identities

Manage roles


Manage authentication

Plan and implement secure access

Configure application access


Plan for Microsoft 365 Apps deployment

Plan for messaging deployments

Plan for Microsoft SharePoint Online and OneDrive for Business

Plan for Microsoft Teams infrastructure

Plan Microsoft Power Platform integration


Thank you for taking the time to read my MS-100 study guide. If you have any questions about the exam please leave them below and I will respond. 

Check out some more guides similar to the MS-100:

Daniel Bradley

My name is Daniel Bradley and I work with Microsoft 365 and Azure as an Engineer and Consultant. I enjoy writing technical content for you and engaging with the community. All opinions are my own.

This Post Has One Comment

  1. Mark

    Thanks for your blog, nice to read. Do not stop.

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