Update microsoft-365-copilot-overview.md

Adding info on Copilot Search

Author: davidedwards365

copilot/microsoft-365-copilot-overview.md

@@ -57,6 +57,8 @@ Microsoft 365 Copilot:
 
 - Uses content in [Microsoft Graph](/graph/overview) to personalize the responses with a user's work emails, chats, and documents. Copilot only shows the data that users have permission to access.
 
+- Includes [Microsoft 365 Copilot Search](/copilot/microsoft-365/microsoft-365-copilot-search), a universal search experience that allows users to search across all their Microsoft 365 and third-party data sources to find what they need quickly.
+
 - Coordinates large language models (LLMs). LLMs are a type of artificial intelligence (AI) algorithms. These algorithms use deep learning techniques and data sets to understand, summarize, predict, and generate content.
 
   The LLMs include pretrained models, like Generative Pre-Trained Transformers, like GPT-4, that are designed for these tasks. To learn more about Generative Pre-Trained Transformers (GPT), ask [Copilot](https://copilot.microsoft.com).
@@ -65,6 +67,7 @@ To learn more, see:
 
 - [Microsoft 365 Copilot architecture and how it works](microsoft-365-copilot-architecture.md)
 - [Microsoft 365 Copilot service description](/office365/servicedescriptions/office-365-platform-service-description/microsoft-365-copilot)
+- [Microsoft 365 Copilot Search overview](/copilot/microsoft-365/microsoft-365-copilot-search)
 - Video: [Copilot system explained by Microsoft](https://www.youtube.com/watch?v=E5g20qmeKpg)
 - Video: [Microsoft 365 Copilot, LLMs, and your apps](https://www.youtube.com/watch?v=B2-8wrF9Okc)
 - Video: [How to get ready for Microsoft 365 Copilot](https://aka.ms/M365CopilotAdmin)
@@ -87,6 +90,12 @@ With Microsoft 365 Copilot Chat, you can draft content, review what you missed,
 
 You can use Microsoft 365 Copilot Chat in Microsoft Teams, in the Microsoft 365 Copilot Chat app, at [Microsoft365.com](https://www.microsoft365.com/), and at [copilot.microsoft.com](https://copilot.microsoft.com/).
 
+✅ **Microsoft 365 Copilot Search**
+
+Copilot Search is an AI-powered universal search experience across all your Microsoft 365 applications and non-Microsoft data sources. It's integrated with Microsoft 365 Copilot, so users can find the results they need with search, then seamlessly transition to chat for deeper exploration or follow-up task completion.
+
+Learn more about [Copilot Search](/copilot/microsoft-365/microsoft-365-copilot-search).
+
 ✅ **Microsoft Graph**
 
 Microsoft Graph includes information on users, their activities, and the organization data they can access. The Microsoft Graph API brings a personalized context into the prompt, like information from a user's emails, chats, documents, and meetings.