Get-BackupContainer : Throw backupManagementType is required when containertype is windows

Author: swatimadhukargit

src/ResourceManager/RecoveryServices.Backup/Commands.RecoveryServices.Backup.Models/Properties/Resources.Designer.cs

@@ -423,7 +423,7 @@ Please contact Microsoft for further assistant.</value>
     <value>BackupManagementType is not expected for WorkloadType: {0}</value>
   </data>
   <data name="BackupManagementTypeRequiredForContainerType" xml:space="preserve">
-    <value>BackupManagementType provider for ContainerType {0} is incorrect.</value>
+    <value>BackupManagementType needs to be specified for ContainerType {0}</value>
   </data>
   <data name="BackupManagementTypeRequiredForWorkloadType" xml:space="preserve">
     <value>BackupManagementType is also required for WorkloadType: {0}</value>
@@ -434,4 +434,7 @@ Please contact Microsoft for further assistant.</value>
   <data name="UnExpectedBackupManagementTypeException" xml:space="preserve">
     <value>Unexpected BackupManagementType - expected:{0}, current:{1}</value>
   </data>
+  <data name="BackupManagementTypeIncorrectForContainerType" xml:space="preserve">
+    <value>BackupManagementType provider for ContainerType {0} is incorrect.</value>
+  </data>
 </root>

src/ResourceManager/RecoveryServices.Backup/Commands.RecoveryServices.Backup.Models/Properties/Resources.resx

@@ -47,13 +47,15 @@ public IPsBackupProvider GetProviderInstance(ContainerType containerType, Backup
                     if (backupManagementType == BackupManagementType.AzureVM || backupManagementType == null)
                         providerType = PsBackupProviderTypes.IaasVm;
                     else
-                        throw new ArgumentException(String.Format(Resources.BackupManagementTypeRequiredForContainerType, containerType));
+                        throw new ArgumentException(String.Format(Resources.BackupManagementTypeIncorrectForContainerType, containerType));
                     break;
                 case ContainerType.Windows:
                     if (backupManagementType == BackupManagementType.MARS)
                         providerType = PsBackupProviderTypes.Mab;
-                    else
+                    else if (backupManagementType == null)
                         throw new ArgumentException(String.Format(Resources.BackupManagementTypeRequiredForContainerType, containerType));
+                    else
+                        throw new ArgumentException(String.Format(Resources.BackupManagementTypeIncorrectForContainerType, containerType));
                     break;
                 default:
                     throw new ArgumentException(String.Format(Resources.UnsupportedContainerType, containerType.ToString()));