[Abhinav Maurya (Fire162)]

Motivation and Context

Fixes #14684.

When fields declare a storage_name alias, ensure_collection_exists creates index fields with their storage names, and search(SearchType.VECTOR) queries them via storage_name or name. However, hybrid_search() emitted declared property names (field.name), causing Azure AI Search to reject hybrid queries referencing unindexed field names (400 unknown field).

Description

• Update AzureAISearchCollection in the SearchType.KEYWORD_HYBRID branch to use field.storage_name or field.name for search_fields and vector_field.storage_name or vector_field.name for vector queries, aligning with the index schema and the vector search branch.
• Map options.additional_property_name to its storage name alias when it matches a configured field.
• Added unit tests in tests/unit/connectors/memory/test_azure_ai_search.py verifying storage names are emitted for both default and custom search_fields and vector queries in hybrid search.

Contribution Checklist

• The code builds clean without any errors or warnings
• The PR follows the SK Contribution Guidelines and the pre-submission formatting script raises no violations
• All unit tests pass, and I have added new tests where possible
• I didn't break anyone 😄

[Copilot]

🟡 Changes recommended

The combined name/alias lookup allows an earlier storage alias to shadow a declared property, making resolution order-dependent and potentially emitting the wrong storage name.

1 open issue

• Prioritize declared names over aliases during property resolution · New

What changed in this PR

This PR addresses #14684 by aligning Azure AI Search hybrid requests with storage-name aliases used by index creation and vector-only search.

Changes:

• Use storage names for hybrid text-search fields and vector queries.
• Resolve custom additional_property_name values against configured fields.
• Add regression coverage for default fields, declared property names, and direct storage-name inputs.

File	Description
python/​tests/​unit/​connectors/​memory/​test_azure_ai_search.py	Adds hybrid-search tests for aliased text and vector fields.
python/​semantic_kernel/​connectors/​azure_ai_search.py	Applies storage-name resolution to hybrid search requests.

_{Review effort: Balanced}