Hello Sijin Thomas,
Thank you for posting your question in the Microsoft Q&A forum.
No, Elasticsearch 2.3 is not supported on Azure's managed Elasticsearch services (now part of Azure Elasticsearch Service, powered by Elastic).
- Azure only supports Elasticsearch 6.8+ (via https://www.elastic.co/elastic-stack/).
Older versions (like 2.3) are deprecated and pose security risks.
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