Power Platform Community Forum Thread Details

I've followed the official documentation, recent tutorials, and several MVP videos.

My index is vector-based (text-embedding-3-small), built using **Import and Vectorize Data**, and works perfectly in Search Explorer — I get the expected documents.

But in **Copilot Studio**, I always get: **“No information was found to answer your question.”** Even with simple queries.

What I’ve confirmed:
- Connection is successful ✅
- No filters are applied in Copilot ✅

I’ve also tested:
- Different embedding models (ada-002, 3-large)
- Index with no image vectors
- Minimal index (just `chunk` and `text_vector`)
- `retrievable: true` for text field and false
- Brand new agent with clean setup

Still the same issue.

👉 Is anyone still able to use **Azure AI Search directly** in Copilot Studio as a knowledge source — **without using a Power Automate flow or a legacy agent**?

Feels like something recently broke.

why : because all video and tutos are
- few month old
- recent live conference "don t work" at the end when demo "tadaa oups "

is there a trick in creating the agent ? something about security ? my cop studio is connected (green connexion) but the "0 answer" is instant and very fast : is there a new auth mode to configure in azure ?

Thanks for your help or insight!

Categories:

General topics

Ok, found the answer (i feel kinda ... little shame to find few hours just after posting... i realy took 1 week of investigation before asking ^^')

So why it's stop working for some people and not other :

**Copilot Studio now requires Semantic Search to be enabled on the Azure AI Search index.**

**Important detail:**

The **Free tier** of Azure AI Search seem to claims to support Semantic Search in the portal UI — but it doesn't activate the feature in reality.

### To make it work:
1. Use an index with a **Standard pricing tier** (tested on Standard S1).
2. Ensure the index includes a `semanticConfiguration`. (by default yes)
3. Use a supported embedding model (e.g. `text-embedding-3-small` with 1536 dimensions).
4. Copilot Studio will then return results correctly and immediately.

how to test : Copilot studio use the folowing model : 2024-07-01 , when you test in Azure, by default it's not this one... so you could think it's ok but no : try with this one (ATM)

If some one in the futur have a problem and don't know how to find the model or other information : activate log analytics on the platform will show you copilot studio request , they containt the parameters and model :)

Hope this helps others facing the same issue.

PS : a Big thanks to the person who helped me resolve this mystery but want to stay in the shadow :)