MS-900 Describe Microsoft 365 apps and services Practice Question
Which TWO Microsoft 365 services provide real-time co-authoring in documents?
⚠ Common exam trap
Candidates often confuse Microsoft Teams' file-sharing and preview capabilities with actual real-time co-authoring, but Teams merely surfaces files from SharePoint or OneDrive and does not host the co-authoring engine itself.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
SharePoint Online
SharePoint Online is correct because it supports real-time co-authoring in Word, Excel, and PowerPoint documents stored in SharePoint document libraries, leveraging the Office Online server infrastructure and the WebDAV protocol for simultaneous edits by multiple users.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Microsoft Teams
Why it's wrong here
Teams is a collaboration hub for chat, meetings, and calling, and while you can share and open files from SharePoint or OneDrive within Teams, the co-authoring sessions themselves are powered by the underlying document storage service, not by Teams itself. Teams does not host file content nor provide the real-time co-authoring engine; therefore it is not considered a co-authoring service.
- ✓
SharePoint Online
Why this is correct
SharePoint Online stores documents in document libraries and natively supports real-time co-authoring via the Office Web Apps and desktop applications, allowing multiple users to edit a document simultaneously with presence indicators and automatic versioning. Because SharePoint is a first-class document management service, it is one of the two correct services.
- ✗
Microsoft Lists
Why it's wrong here
Microsoft Lists is an app for tracking and managing structured data in a list format, such as issues or assets; it does not support co-authoring of Word, Excel, or PowerPoint documents. While lists can have attachments and multiple users can edit list items, that is not document co-authoring, and the lists themselves are not documents for real-time co-editing in the same sense.
- ✗
Exchange Online
Why it's wrong here
Exchange Online is a hosted email, calendar, and contacts service; it does not store or edit documents for co-authoring. It can transmit documents as attachments but provides no real-time collaborative editing capability, making it unrelated to document co-authoring.
- ✓
OneDrive for Business
Why this is correct
OneDrive for Business is the personal cloud storage library built on SharePoint, and it supports real-time co-authoring for Office documents when users edit together, provided the files are stored there and opened in compatible Office apps. Because OneDrive is the other primary document-storage-based co-authoring service in Microsoft 365, it is the second correct answer.
Go deeper
Related to this question
Learn chapter
Microsoft Migration Tools: SharePoint and Exchange
Key term
SharePoint Online
SharePoint Online is a cloud-based collaboration platform from Microsoft that lets teams create, store, organize, and share content securely from anywhere.
Key term
Microsoft 365
Microsoft 365 is a subscription-based cloud service from Microsoft that combines productivity tools like Office apps with security, device management, and online storage.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This MS-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MS-900 exam.