diff --git a/lib/session/call-session.js b/lib/session/call-session.js
index 7d25ec11..4348e66d 100644
--- a/lib/session/call-session.js
+++ b/lib/session/call-session.js
@@ -549,7 +549,9 @@ class CallSession extends Emitter {
           return {
             speech_credential_sid: credential.speech_credential_sid,
             api_key: credential.api_key,
-            region: credential.region
+            region: credential.region,
+            use_custom_stt: credential.use_custom_stt,
+            custom_stt_endpoint: credential.custom_stt_endpoint
           };
         }
         else if ('wellsaid' === vendor) {
diff --git a/lib/tasks/gather.js b/lib/tasks/gather.js
index 2b908686..ebda4bfc 100644
--- a/lib/tasks/gather.js
+++ b/lib/tasks/gather.js
@@ -82,6 +82,7 @@ class TaskGather extends Task {
       this.requestSnr = recognizer.requestSnr || false;
       this.initialSpeechTimeoutMs = recognizer.initialSpeechTimeoutMs || 0;
       this.azureServiceEndpoint = recognizer.azureServiceEndpoint;
+      this.azureSttEndpointId = recognizer.azureSttEndpointId;
     }
     else {
       this.hints = [];
@@ -358,10 +359,18 @@ class TaskGather extends Task {
     else if ('microsoft' === this.vendor) {
       this.bugname = 'azure_transcribe';
       if (this.sttCredentials) {
+        const {api_key, region, use_custom_stt, custom_stt_endpoint} = this.sttCredentials;
+
         Object.assign(opts, {
-          'AZURE_SUBSCRIPTION_KEY': this.sttCredentials.api_key,
-          'AZURE_REGION': this.sttCredentials.region
+          'AZURE_SUBSCRIPTION_KEY': api_key,
+          'AZURE_REGION': region
         });
+        if (this.azureSttEndpointId) {
+          Object.assign(opts, {'AZURE_SERVICE_ENDPOINT_ID': this.azureSttEndpointId});
+        }
+        else if (use_custom_stt && custom_stt_endpoint) {
+          Object.assign(opts, {'AZURE_SERVICE_ENDPOINT_ID': custom_stt_endpoint});
+        }
       }
       if (this.hints && this.hints.length > 0) {
         opts.AZURE_SPEECH_HINTS = this.hints.map((h) => h.trim()).join(',');
diff --git a/lib/tasks/specs.json b/lib/tasks/specs.json
index 0ecc4972..40c8b643 100644
--- a/lib/tasks/specs.json
+++ b/lib/tasks/specs.json
@@ -497,6 +497,7 @@
       "requestSnr": "boolean",
       "initialSpeechTimeoutMs": "number",
       "azureServiceEndpoint": "string",
+      "azureSttEndpointId": "string",
       "asrDtmfTerminationDigit": "string",
       "asrTimeout": "number"
     },
diff --git a/lib/tasks/transcribe.js b/lib/tasks/transcribe.js
index 44856e81..cb10c09b 100644
--- a/lib/tasks/transcribe.js
+++ b/lib/tasks/transcribe.js
@@ -54,6 +54,7 @@ class TaskTranscribe extends Task {
     this.requestSnr = recognizer.requestSnr || false;
     this.initialSpeechTimeoutMs = recognizer.initialSpeechTimeoutMs || 0;
     this.azureServiceEndpoint = recognizer.azureServiceEndpoint;
+    this.azureSttEndpointId = recognizer.azureSttEndpointId;
   }
 
   get name() { return TaskName.Transcribe; }
@@ -232,10 +233,17 @@ class TaskTranscribe extends Task {
     }
     else if (this.vendor === 'microsoft') {
       this.bugname = 'azure_transcribe';
+      const {api_key, region, use_custom_stt, custom_stt_endpoint} = this.sttCredentials;
       Object.assign(opts, {
-        'AZURE_SUBSCRIPTION_KEY': this.sttCredentials.api_key,
-        'AZURE_REGION': this.sttCredentials.region
+        'AZURE_SUBSCRIPTION_KEY': api_key,
+        'AZURE_REGION': region
       });
+      if (this.azureSttEndpointId) {
+        Object.assign(opts, {'AZURE_SERVICE_ENDPOINT_ID': this.azureSttEndpointId});
+      }
+      else if (use_custom_stt && custom_stt_endpoint) {
+        Object.assign(opts, {'AZURE_SERVICE_ENDPOINT_ID': custom_stt_endpoint});
+      }
       if (this.hints && this.hints.length > 0) {
         opts.AZURE_SPEECH_HINTS = this.hints.map((h) => h.trim()).join(',');
       }
diff --git a/lib/utils/db-utils.js b/lib/utils/db-utils.js
index 7eb36a7e..c06b9092 100644
--- a/lib/utils/db-utils.js
+++ b/lib/utils/db-utils.js
@@ -36,6 +36,8 @@ const speechMapper = (cred) => {
     const o = JSON.parse(decrypt(credential));
     obj.api_key = o.api_key;
     obj.region = o.region;
+    obj.use_custom_stt = o.use_custom_stt;
+    obj.custom_stt_endpoint = o.custom_stt_endpoint;
   }
   else if ('wellsaid' === obj.vendor) {
     const o = JSON.parse(decrypt(credential));