code: public Observable<ServerAzureADAdministratorInner> beginCreateOrUpdateAsync(String resourceGroupName, String serverName, ServerAzureADAdministratorInner properties) {
          return beginCreateOrUpdateWithServiceResponseAsync(resourceGroupName, serverName, properties).map(new Func1<ServiceResponse<ServerAzureADAdministratorInner>, ServerAzureADAdministratorInner>() {
              @Override
              public ServerAzureADAdministratorInner call(ServiceResponse<ServerAzureADAdministratorInner> response) {
                  return response.body();
              }
          });
      }
docs: Creates a new Server Active Directory Administrator or updates an existing server Active Directory Administrator.
  
  @param resourceGroupName The name of the resource group that contains the resource. You can obtain this value from the Azure Resource Manager API or the portal.
  @param serverName The name of the server.
  @param properties The required parameters for creating or updating an Active Directory Administrator.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the ServerAzureADAdministratorInner object