Could not complete vectorization action. The vectorization endpoint returned status code '401' (Unauthorized).

Question

I am having the issue when vector querying an index in Azure AI Search. The error message is:

Could not complete vectorization action. The vectorization endpoint returned status code '401' (Unauthorized).

I've checked both my AI Search and Azure OpenAI; both are enabled with public access.

Answer 1

@Tho Le Glad that you were able to resolve your issue and I appreciate your effort in sharing the solution. Your contribution will undoubtedly assist others facing similar challenges.

As the [Microsoft Q&A community follows a policy where the question author cannot accept their own answer] {https://learn.microsoft.com/en-us/answers/support/accept-answer} ,

I've reposted your solution.  Feel free to consider "Accepting" the answer if you find it suitable.

Resolution-

• Enable public access on both Azure AI Search and Azure OpenAI.
• In Azure OpenAI access control, add Azure AI Search as a Cognitive Service OpenAI Contributor role.

Answer 2

I followed the accepted answer, but I was still encountering the 401 error.

In my case the problem was solved by checking the vectorizer configuration. I had to set the "Model deployment" option and save it (even though it was specified in my JSON config).

However, when I reopen the vectorizer configuration, the model name is still not displayed.

Answer 3

You should be able to assign "Cognitive Service OpenAI User" role and still get access to the embedding model. This worked for me, and it's better to go with least privileges as a best practice.