diff --git a/api/server/services/Files/Audio/STTService.js b/api/server/services/Files/Audio/STTService.js
index 60d6a48a14..16f806de4e 100644
--- a/api/server/services/Files/Audio/STTService.js
+++ b/api/server/services/Files/Audio/STTService.js
@@ -227,7 +227,6 @@ class STTService {
     }
 
     const headers = {
-      'Content-Type': 'multipart/form-data',
       ...(apiKey && { 'api-key': apiKey }),
     };
 
diff --git a/packages/api/src/utils/azure.ts b/packages/api/src/utils/azure.ts
index b4051d3d80..1bbd0e29b2 100644
--- a/packages/api/src/utils/azure.ts
+++ b/packages/api/src/utils/azure.ts
@@ -25,6 +25,12 @@ export const genAzureEndpoint = ({
   azureOpenAIApiInstanceName: string;
   azureOpenAIApiDeploymentName: string;
 }): string => {
+  // Support both old (.openai.azure.com) and new (.cognitiveservices.azure.com) endpoint formats
+  // If instanceName already includes a full domain, use it as-is
+  if (azureOpenAIApiInstanceName.includes('.azure.com')) {
+    return `https://${azureOpenAIApiInstanceName}/openai/deployments/${azureOpenAIApiDeploymentName}`;
+  }
+  // Legacy format for backward compatibility
   return `https://${azureOpenAIApiInstanceName}.openai.azure.com/openai/deployments/${azureOpenAIApiDeploymentName}`;
 };