diff --git a/src/Common/Constants.ts b/src/Common/Constants.ts
index ff121f3a5..cb4c8f007 100644
--- a/src/Common/Constants.ts
+++ b/src/Common/Constants.ts
@@ -133,6 +133,7 @@ export enum MongoBackendEndpointType {
 export class BackendApi {
   public static readonly GenerateToken: string = "GenerateToken";
   public static readonly PortalSettings: string = "PortalSettings";
+  public static readonly AccountRestrictions: string = "AccountRestrictions";
 }
 
 export class PortalBackendEndpoints {
diff --git a/src/Platform/Hosted/Components/ConnectExplorer.tsx b/src/Platform/Hosted/Components/ConnectExplorer.tsx
index 513247a6c..64f8540b7 100644
--- a/src/Platform/Hosted/Components/ConnectExplorer.tsx
+++ b/src/Platform/Hosted/Components/ConnectExplorer.tsx
@@ -51,13 +51,18 @@ export const fetchEncryptedToken_ToBeDeprecated = async (connectionString: strin
 export const isAccountRestrictedForConnectionStringLogin = async (connectionString: string): Promise<boolean> => {
   const headers = new Headers();
   headers.append(HttpHeaders.connectionString, connectionString);
-  const url = configContext.BACKEND_ENDPOINT + "/api/guest/accountrestrictions/checkconnectionstringlogin";
+
+  const backendEndpoint: string = useNewPortalBackendEndpoint(BackendApi.PortalSettings)
+    ? configContext.PORTAL_BACKEND_ENDPOINT
+    : configContext.BACKEND_ENDPOINT;
+
+  const url = backendEndpoint + "/api/guest/accountrestrictions/checkconnectionstringlogin";
   const response = await fetch(url, { headers, method: "POST" });
   if (!response.ok) {
     throw response;
   }
 
-  return (await response.text()) === "True";
+  return (await response.text()).toLowerCase() === "true";
 };
 
 export const ConnectExplorer: React.FunctionComponent<Props> = ({
diff --git a/src/Utils/EndpointUtils.ts b/src/Utils/EndpointUtils.ts
index 97e733b98..b685dc71a 100644
--- a/src/Utils/EndpointUtils.ts
+++ b/src/Utils/EndpointUtils.ts
@@ -164,6 +164,7 @@ export function useNewPortalBackendEndpoint(backendApi: string): boolean {
       PortalBackendEndpoints.Mpac,
       PortalBackendEndpoints.Prod,
     ],
+    [BackendApi.AccountRestrictions]: [PortalBackendEndpoints.Development, PortalBackendEndpoints.Mpac],
   };
 
   if (!newBackendApiEnvironmentMap[backendApi] || !configContext.PORTAL_BACKEND_ENDPOINT) {