Update smart-on-fhir-proxy-migration.md

Author: EXPEkesheth

articles/healthcare-apis/includes/smart-on-fhir-proxy-migration.md

@@ -9,6 +9,9 @@ ms.author: kesheth
 ms.custom: "include file"
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+> [!IMPORTANT]
+> **SMART on FHIR proxy is retiring in September 2026**, transition to the SMART on FHIR (Enhanced) by that date. Beginning September 2026, applications relying on SMART on FHIR proxy will report errors in accessing the FHIR service.
+
 SMART on FHIR (Enhanced) provides more capabilities compared to SMART on FHIR proxy. SMART on FHIR(Enhanced) can be considered to meet requirements with [SMART on FHIR Implementation Guide (v 1.0.0)](https://hl7.org/fhir/smart-app-launch/1.0.0/) and [§170.315(g)(10) Standardized API for patient and population services criterion.](https://www.healthit.gov/test-method/standardized-api-patient-and-population-services#ccg)
 The following table lists the difference between SMART on FHIR proxy and SMART on FHIR (Enhanced).