diff --git a/msal4j-sdk/src/integrationtest/java/com.microsoft.aad.msal4j/ClientCredentialsIT.java b/msal4j-sdk/src/integrationtest/java/com.microsoft.aad.msal4j/ClientCredentialsIT.java
index 6e12baeb..8c1f5256 100644
--- a/msal4j-sdk/src/integrationtest/java/com.microsoft.aad.msal4j/ClientCredentialsIT.java
+++ b/msal4j-sdk/src/integrationtest/java/com.microsoft.aad.msal4j/ClientCredentialsIT.java
@@ -172,7 +172,7 @@ private void assertAcquireTokenCommon_withRegion(String clientId, IClientCredent
 
         ConfidentialClientApplication ccaRegion = ConfidentialClientApplication.builder(
                 clientId, credential).
-                authority(TestConstants.MICROSOFT_AUTHORITY).azureRegion("westus").
+                authority("https://login.microsoft.com/microsoft.onmicrosoft.com").azureRegion("westus").
                 build();
 
         //Ensure behavior when region not specified
diff --git a/msal4j-sdk/src/integrationtest/java/com.microsoft.aad.msal4j/TestConstants.java b/msal4j-sdk/src/integrationtest/java/com.microsoft.aad.msal4j/TestConstants.java
index 950109dc..97e65f16 100644
--- a/msal4j-sdk/src/integrationtest/java/com.microsoft.aad.msal4j/TestConstants.java
+++ b/msal4j-sdk/src/integrationtest/java/com.microsoft.aad.msal4j/TestConstants.java
@@ -30,7 +30,7 @@ public class TestConstants {
     public final static String COMMON_AUTHORITY_WITH_PORT = MICROSOFT_AUTHORITY_HOST_WITH_PORT + "msidlab4.onmicrosoft.com";
     public final static String MICROSOFT_AUTHORITY = MICROSOFT_AUTHORITY_HOST + "microsoft.onmicrosoft.com";
     public final static String TENANT_SPECIFIC_AUTHORITY = MICROSOFT_AUTHORITY_HOST + MICROSOFT_AUTHORITY_TENANT;
-    public final static String REGIONAL_MICROSOFT_AUTHORITY_BASIC_HOST_WESTUS = "westus.r." + MICROSOFT_AUTHORITY_BASIC_HOST;
+    public final static String REGIONAL_MICROSOFT_AUTHORITY_BASIC_HOST_WESTUS = "westus.login.microsoft.com";
 
     public final static String ARLINGTON_ORGANIZATIONS_AUTHORITY = ARLINGTON_MICROSOFT_AUTHORITY_HOST + "organizations/";
     public final static String ARLINGTON_COMMON_AUTHORITY = ARLINGTON_MICROSOFT_AUTHORITY_HOST + "common/";
@@ -45,7 +45,7 @@ public class TestConstants {
     public final static String B2C_AUTHORITY_SIGN_IN = B2C_AUTHORITY + B2C_SIGN_IN_POLICY;
     public final static String B2C_AUTHORITY_ROPC = B2C_AUTHORITY + B2C_ROPC_POLICY;
     public final static String B2C_READ_SCOPE = "https://msidlabb2c.onmicrosoft.com/msidlabb2capi/read";
-    public final static String B2C_MICROSOFTLOGIN_AUTHORITY = "https://login.microsoftonline.com/tfp/msidlabb2c.onmicrosoft.com/";
+    public final static String B2C_MICROSOFTLOGIN_AUTHORITY = "https://msidlabb2c.b2clogin.com/tfp/msidlabb2c.onmicrosoft.com/";
     public final static String B2C_MICROSOFTLOGIN_ROPC = B2C_MICROSOFTLOGIN_AUTHORITY + B2C_ROPC_POLICY;
 
     public final static String LOCALHOST = "http://localhost:";
diff --git a/msal4j-sdk/src/main/java/com/microsoft/aad/msal4j/AadInstanceDiscoveryProvider.java b/msal4j-sdk/src/main/java/com/microsoft/aad/msal4j/AadInstanceDiscoveryProvider.java
index 11b2628b..6d756ea7 100644
--- a/msal4j-sdk/src/main/java/com/microsoft/aad/msal4j/AadInstanceDiscoveryProvider.java
+++ b/msal4j-sdk/src/main/java/com/microsoft/aad/msal4j/AadInstanceDiscoveryProvider.java
@@ -22,7 +22,7 @@ class AadInstanceDiscoveryProvider {
     private final static String AUTHORIZE_ENDPOINT_TEMPLATE = "https://{host}/{tenant}/oauth2/v2.0/authorize";
     private final static String INSTANCE_DISCOVERY_ENDPOINT_TEMPLATE = "https://{host}:{port}/common/discovery/instance";
     private final static String INSTANCE_DISCOVERY_REQUEST_PARAMETERS_TEMPLATE = "?api-version=1.1&authorization_endpoint={authorizeEndpoint}";
-    private final static String HOST_TEMPLATE_WITH_REGION = "{region}.r.{host}";
+    private final static String HOST_TEMPLATE_WITH_REGION = "{region}.{host}";
     private final static String SOVEREIGN_HOST_TEMPLATE_WITH_REGION = "{region}.{host}";
     private final static String REGION_NAME = "REGION_NAME";
     private final static int PORT_NOT_SET = -1;