Hello johananmahendran,
Welcome to the Microsoft Q&A and thank you for posting your questions here.
You can retrieve an additional field from your Azure AI Search index using the Azure OpenAI API. Also, to ensure that your search index schema includes these additional fields and that your search query explicitly requests them. Follow these links for more step by steps: https://learn.microsoft.com/en-us/azure/ai-services/openai/references/azure-search and https://learn.microsoft.com/en-us/azure/ai-services/openai/concepts/use-your-data
I hope this is helpful! Do not hesitate to let me know if you have any other questions.
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