/// <summary>
        /// Return test credentials and URI using AAD auth for an OrgID account.  Use this method with caution, it may take a dependency on ADAL
        /// </summary>
        /// <returns>The test credentials, or null if the appropriate environment variable is not set.</returns>
        public static TestEnvironment GetTestEnvironment()
        {
            string          connectionString = Environment.GetEnvironmentVariable(TestCSMOrgIdConnectionStringKey);
            TestEnvironment testEnv          = new TestEnvironment(TestUtilities.ParseConnectionString(connectionString));

            if (HttpMockServer.Mode == HttpRecorderMode.Playback)
            {
                testEnv.UserName = TestEnvironment.UserIdDefault;
                SetEnvironmentSubscriptionId(testEnv, connectionString);
                testEnv.TokenInfo[TokenAudience.Management] = new TokenCredentials(TestEnvironment.RawToken);
                testEnv.TokenInfo[TokenAudience.Graph]      = new TokenCredentials(TestEnvironment.RawGraphToken);
            }
            else //Record or None
            {
                if (!string.IsNullOrEmpty(connectionString))
                {
                    IDictionary <string, string> parsedConnection = TestUtilities.ParseConnectionString(connectionString);

                    foreach (var keyVal in CustomEnvValues)
                    {
                        parsedConnection[keyVal.Key] = keyVal.Value;
                    }
                    testEnv = new TestEnvironment(parsedConnection);

                    if (parsedConnection.ContainsKey(TestEnvironment.RawToken))
                    {
                        testEnv.TokenInfo[TokenAudience.Management] = new TokenCredentials(TestEnvironment.RawToken);
                        testEnv.TokenInfo[TokenAudience.Graph]      = new TokenCredentials(TestEnvironment.RawGraphToken);
                    }
                    else
                    {
                        string password = null;
                        parsedConnection.TryGetValue(TestEnvironment.AADPasswordKey, out password);

                        if (testEnv.UserName != null && password != null)
                        {
                            TestEnvironmentFactory.LoginUserAsync(
                                testEnv.TokenInfo,
                                testEnv.Tenant,
                                testEnv.UserName,
                                password,
                                testEnv.Endpoints)
                            .ConfigureAwait(false).GetAwaiter().GetResult();
                        }
                        else if (testEnv.ServicePrincipal != null && password != null)
                        {
                            TestEnvironmentFactory.LoginServicePrincipalAsync(
                                testEnv.TokenInfo,
                                testEnv.Tenant,
                                testEnv.ServicePrincipal,
                                password,
                                testEnv.Endpoints)
                            .ConfigureAwait(false).GetAwaiter().GetResult();
                        }
#if NET45
                        else
                        {
                            TestEnvironmentFactory.LoginWithPromptAsync(
                                testEnv.TokenInfo,
                                testEnv.Tenant,
                                testEnv.Endpoints);
                        }
#endif
                    }
                }//end-of-if connectionString present

                // Management Clients that are not subscription based should set "SubscriptionId=None" in
                // the connection string.
                if (testEnv.SubscriptionId == null || !testEnv.SubscriptionId.Equals("None", StringComparison.OrdinalIgnoreCase))
                {
                    //Getting subscriptions from server
                    var subscriptions = ListSubscriptions(
                        testEnv.BaseUri.ToString(),
                        testEnv.TokenInfo[TokenAudience.Management]);

                    if (subscriptions.Count == 0)
                    {
                        throw new Exception("Logged in account had no associated subscriptions. We are in " +
                                            testEnv.Endpoints.Name + " environment and the tenant is " +
                                            testEnv.Tenant + ". Please check if the subscription is in the " +
                                            "correct tenant and environment. You can set the envt. variable - " +
                                            "TEST_CSM_ORGID_AUTHENTICATION=SubscriptionId=<subscription-id>;" +
                                            "Environment=<Env-name>;Tenant=<tenant-id>");
                    }

                    bool matchingSubscription = false;
                    //SubscriptionId is provided in envt. variable
                    if (testEnv.SubscriptionId != null)
                    {
                        matchingSubscription = subscriptions.Any(item => item.SubscriptionId == testEnv.SubscriptionId);
                        if (!matchingSubscription)
                        {
                            throw new Exception("The provided SubscriptionId in the envt. variable - \"" + testEnv.SubscriptionId +
                                                "\" does not match the list of subscriptions associated with this account.");
                        }
                    }
                    else
                    {
                        if (subscriptions.Count > 1)
                        {
                            throw new Exception("There are multiple subscriptions associated with the logged in account. " +
                                                "Please specify the subscription to use in the connection string. Please set " +
                                                "the envt. variable - TEST_CSM_ORGID_AUTHENTICATION=SubscriptionId=<subscription-id>");
                        }
                        testEnv.SubscriptionId = subscriptions[0].SubscriptionId;
                    }
                }

                if (testEnv.SubscriptionId == null)
                {
                    throw new Exception("Subscription Id was not provided in environment variable. " + "Please set " +
                                        "the envt. variable - TEST_CSM_ORGID_AUTHENTICATION=SubscriptionId=<subscription-id>. " +
                                        "If SubscriptionId is not required for your management client then please set it to " +
                                        "'None' in the above mentioned envt. variable.");
                }

                SetEnvironmentSubscriptionId(testEnv, connectionString);
            }

            return(testEnv);
        }