Copilot for Outlook AI Features
An organization wants to use AI to summarize long email threads and suggest replies in Outlook. Which Microsoft 365 feature provides this capability?
Quick Answer
Microsoft Copilot for Microsoft 365 is the feature that brings AI-generated summaries and suggested replies directly into Outlook, working from the same Microsoft Graph data the mailbox already holds. Rather than a separate add-on that reads email independently, Copilot integrates with Outlook's interface to condense a long thread into its key points on request and draft context-aware reply suggestions the user can edit before sending — both powered by a large language model reasoning over the conversation content and the broader Graph signals like related documents and prior correspondence. This grounding in Graph data is what distinguishes Copilot's output from a generic AI writing tool: the summary reflects what is actually in that specific thread and mailbox, respecting the same permissions the user already has. On the exam, any scenario asking specifically about AI features built into an existing Microsoft 365 application like Outlook, Word, or Teams is pointing at Copilot for Microsoft 365 by name.
⚠ Common exam trap
Test-takers frequently confuse Microsoft Editor's basic AI writing assistance with Copilot's advanced generative AI capabilities, assuming Editor can handle complex tasks like summarization and reply generation, but Editor lacks the underlying large language model and Graph integration required for those features.
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
✓
Microsoft Copilot for Microsoft 365
Microsoft Copilot for Microsoft 365 integrates AI directly into Outlook to summarize long email threads and generate suggested replies. It uses large language models and the Microsoft Graph to analyze conversation context, extract key points, and draft responses, all within the user's mailbox. This is the only Microsoft 365 feature designed specifically for these natural language processing tasks in Outlook.
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 Copilot for Microsoft 365
Why this is correct
Microsoft Copilot for Microsoft 365 is embedded in Outlook and uses the Microsoft Graph plus large language models to summarise lengthy email threads and draft suggested replies directly within the mailbox, matching the stated requirement.
- ✗
Microsoft Editor
Why it's wrong here
Microsoft Editor provides spelling, grammar and style suggestions as you write, plus similarity checking; it does not read a thread and generate a summary or reply. It is tempting because it is an AI-assisted writing tool in Outlook, but its scope is proofing existing text, not comprehending and drafting new content.
- ✗
Microsoft Search
Why it's wrong here
Microsoft Search indexes organisational content and surfaces results across Microsoft 365 apps; it retrieves existing information rather than generating summaries or reply drafts. It is tempting because it operates inside Outlook, but it cannot compose or summarise content, which requires Microsoft 365 Copilot's large language model capabilities.
- ✗
Microsoft Viva Insights
Why it's wrong here
Viva Insights delivers productivity and wellbeing analytics, meeting-load and focus-time reporting from Microsoft Graph, not generative AI drafting inside Outlook. It is tempting because it analyses email metadata, but summarising thread content and suggesting replies requires Microsoft 365 Copilot, which is embedded directly in Outlook.
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Related to this question
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Hybrid Microsoft 365 Deployment Models
Key term
Copilot for Microsoft 365
Copilot for Microsoft 365 is an AI assistant integrated into Microsoft 365 apps that helps users create documents, analyze data, summarize communications, and automate tasks using natural language prompts.
Key term
Outlook
Microsoft Outlook is an email, calendar, and contact management application that is part of the Microsoft 365 suite, used by businesses and individuals to organize communications and schedules.
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Same concept, more angles
1 more way this is tested on MS-900
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A sales manager wants to streamline the process of generating follow-up emails after customer meetings. Which Microsoft 365 app allows them to automatically create email drafts based on meeting notes using AI?
easy- A.SharePoint Online
- ✓ B.Copilot in Outlook
- C.Microsoft Viva Insights
- D.Microsoft Teams Premium
Why B: Copilot in Outlook leverages AI to automatically generate email drafts based on meeting notes, transcripts, or summaries, directly within the Outlook interface. This allows the sales manager to streamline follow-up emails without manual composition, using natural language processing to extract key points and action items from the meeting context.
JA
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.