MS-100 Extras

MS-100 Overview & My Tips

MS-100 or Microsoft 365 Identity and Services is one of two exams that make up the Microsoft 365 Certified Enterprise Administrator Expert certification.  The certification also requires you to pass & hold a valid Microsoft 365 Associate level certification in addition to passing the MS-100 and MS-101.

The Microsoft 365 Certified: Enterprise Administrator Expert is the only Expert level certification for Microsoft 365.  Whilst the Associate certification in Microsoft 365 require Administrator level knowledge and skills, this is the next step up.  You could consider this the consultant level skillset.  You need an in-depth understanding of all features, the configuration options, pros/cons of the options PLUS hands on administration skills across the full set of Microsoft 365 workloads.  Tradition system administrator skills are also helpful as you should also understand DNS, Active Directory (on-prem), networking and on-prem server admin.  The on-prem skills and knowledge is needed to design and configure Microsoft 365 in Hybrid to work in harmony with existing environments as well as to understand requirements of organisations moving to the cloud.

That said, regular visitors to my blog will know that I consider myself a ‘born in the cloud’ admin and as such the traditional system administrator skills are my personal weak area.  Please don’t let that put you off going for this certification, if that also describes you.  You can use your Microsoft 365 knowledge to answer migration and hybrid questions and remember you don’t have to get all 1000 availalbe points to pass.

This exam focuses on identity & access (Azure AD) plus workload security & configuration whilst the MS-101 focuses on device management plus the security & compliance tools.

Disclaimer: All these links were correct at the time of posting.  But the Cloud changes regularly, so the referenced articles my change/be removed.  Please do post a comment if you spot a broken link or have suggestions to add so others can benefit too.

General References

Taking a Microsoft Professional Exam

There are a number of blogs about taking MCP exams.  My personal favourites are:

Pre-study References

Before attending an MS-100 course you should have day-to-day admin experience managing multiple workloads in Microsoft 365  and have a good understanding of the availalbe tools and services in Microsoft 365 PLUS licencing of Microsoft 365.

Microsoft Learn Learning Paths (MS-100)

References by Exam Objectives

Based on the objectives as at 2nd June 2021

It is recommended that you explore each concept in depth and DO NOT consider this list exhaustive.  Please follow links on from these pages to dig deeper into each topic.  This is the EXPERT level exam, after all!  You may also find it helpful to review the exam objectives for the workload admin certifications:

Messaging: Microsoft 365 Certified: Messaging Administrator Associate – Learn | Microsoft Docs

Desktop: Microsoft 365 Certified: Modern Desktop Administrator Associate – Learn | Microsoft Docs

Teams: Microsoft 365 Certified: Teams Administrator Associate – Learn | Microsoft Docs

Security:Microsoft 365 Certified: Security Administrator Associate – Learn | Microsoft Docs

Design and Implement Microsoft 365 Services (25-30%)

See also Adoption guidance:


Plan architecture


Deploy a Microsoft 365 tenant


Manage Microsoft 365 subscription and tenant health

Plan migration of users and data


Manage User Identity and Roles (25-30%)

Design identity strategy

Plan identity synchronization

Manage identity synchronization with Azure Active Directory (Azure AD)

Manage Azure AD identities

Manage roles

Manage Access and Authentication (15-20%)

Manage authentication

This section is covered by Azure Active Directory Authentication documentation | Microsoft Docs

Plan and implement secure access

Configure application access

Plan Office 365 Workloads and Applications (25-30%)

This section information mainly links from Microsoft 365 for enterprise documentation and resources | Microsoft Docs and the following documents are also helpful to summarise features and deployment of Microsoft 365 Microsoft 365 productivity illustrations | Microsoft Docs

Adoption planning is also important and you should review the materials available at Microsoft 365 – Microsoft Adoption to support this.

Plan for Microsoft 365 Apps deployment

Plan for messaging deployments

Plan for Microsoft SharePoint Online and OneDrive for Business

Plan for Microsoft Teams infrastructure

Start from Microsoft Teams deployment overview – Microsoft Teams | Microsoft Docs and also  Microsoft Teams – Microsoft Adoption

Plan Microsoft Power Platform integration

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