New Year, New Momentum: Here are three Copilot updates to get you started into 2026

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It's a new year, so I thought I'd start the year by mentioning three features already released, or soon going to be released. One of the features improves the workflow of sharing files with comments, the other improves the application specific Copilot, and the last feature makes it easer to find the nest available timeslot for a 1:1 meeting. As with all of my other posts, timelines can shift, and the timelines in this post is as written in the Message Center at the time of posting. AI-Summary experience when sharing files. With this new feature, copilot intent to help users share files with clearer context in just a few steps. Users will get the capability to generate a concise summary of a file and include it when sharing from the File Explorer share dialog or the OneDrive activity center. This will make it easier to share the context of a file and giving the receiver a faster understanding of what a document or file contains before they open it. General Availability announced...

Custom Engine Agents in Microsoft 365 Copilot

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Agents in BizChat has been available for some time already, but now there is an upcoming update to Agents. The introduction of “custom engine agents” in Microsoft 365 Copilot! These specialized agents can be built on any large language model (LLM), toolchain, or orchestration tool, tailored specifically for your domain or tenant workflows. Initially supported in Microsoft Teams, this feature will soon be available in Microsoft 365 Copilot Business Chat (BizChat).  

The introduction of Custom engine agents enables your organization to create customized experiences using your own AI systems and orchestrators. You can design unique prompts, connect to any LLM, and integrate these custom agents with Microsoft 365 Copilot. After the rollout, users will be able to access these agents, provided they are enabled and deployed in the Microsoft 365 admin center under the Copilot tab.  You can read more about the feature on this page.

Eligible users can create agents using Microsoft Copilot Studio for low-code tools or the Microsoft Teams Toolkit in Visual Studio for pro-code solutions. Access to Copilot Studio requires enabling the Microsoft Power Automate free license.  

Users can deploy agents for individual tasks and share them with internal teams, but organization-wide sharing requires admin approval. 

This feature is associated with Microsoft 365 Roadmap ID 474439 and will hopefully be in preview during February. The current target for GA is a finished roll-out by end of April.