diff --git a/src/BrazeKit-dev.js b/src/BrazeKit-dev.js
index 2ae12f8..7a4c5db 100644
--- a/src/BrazeKit-dev.js
+++ b/src/BrazeKit-dev.js
@@ -775,6 +775,11 @@ var constructor = function () {
     function finishBrazeInitialization(forwarderSettings) {
         braze.addSdkMetadata(['mp']);
         primeBrazeWebPush();
+
+        if (forwarderSettings.userIdentificationType === 'MPID' && mParticle.Identity != null && mParticle.Identity.getCurrentUser().getMPID() != null) {
+            onUserIdentified(mParticle.Identity.getCurrentUser())
+        }
+        
         openSession(forwarderSettings);
     }
 
diff --git a/test/tests.js b/test/tests.js
index 7094941..08e2666 100644
--- a/test/tests.js
+++ b/test/tests.js
@@ -244,7 +244,22 @@ describe('Braze Forwarder', function() {
             };
         },
         reportService = new ReportingService();
-
+        mParticle.Identity = {
+            getCurrentUser: function () {
+                return {
+                    getMPID: function () {
+                        return 'MPID123';
+                    },
+                    getUserIdentities: function () {
+                        return {
+                            userIdentities: {
+                                customerid: 'abc',
+                            },
+                        };
+                    },
+                };
+            },
+        };
     before(function() {
         // expandCommerceEvent is tightly coupled to mParticle being loaded
         // as well as having a few parameters on the Store.
@@ -1698,6 +1713,16 @@ USD,
         purchaseEventProperties.should.eql(expectedPurchaseEvent);
     });
 
+    it('should call changeUser and openSession on init with userIdentificationType MPID passed in forwarding settings', function() {   
+        mParticle.forwarder.init({
+            apiKey: '123456',
+            userIdentificationType: 'MPID',
+        });
+
+        window.braze.userId.should.equal('MPID123');
+        window.braze.should.have.property('openSessionCalled', true);
+    });
+
     describe('promotion events', function() {
         const mpPromotionEvent = {
             EventName: 'eCommerce - PromotionClick',