address bugs and clarifications

Author: nibaccam

articles/machine-learning/how-to-access-data.md

@@ -75,7 +75,7 @@ When you register an Azure Storage solution as a datastore, you automatically cr
 
 >[!IMPORTANT]
 > As part of the current datastore create and register process, Azure Machine Learning validates that the user provided principal (username, service principal or SAS token) has access to the underlying storage service. 
-<br>
+<br><br>
 However, for Azure Data Lake Storage Gen 1 and 2 datastores, this validation  happens later when data access methods like [`from_files()`](https://docs.microsoft.com/python/api/azureml-core/azureml.data.dataset_factory.filedatasetfactory?view=azure-ml-py) or [`from_delimited_files()`](https://docs.microsoft.com/python/api/azureml-core/azureml.data.dataset_factory.tabulardatasetfactory?view=azure-ml-py#from-parquet-files-path--validate-true--include-path-false--set-column-types-none--partition-format-none-) are called. 
 
 ### Python SDK
@@ -85,10 +85,13 @@ All the register methods are on the [`Datastore`](https://docs.microsoft.com/pyt
 You can find the information that you need to populate the `register()` method by using the [Azure portal](https://portal.azure.com):
 
 1. Select **Storage Accounts** on the left pane, and choose the storage account that you want to register. 
-2. For information like the account name, container, and file share name, go to the **Overview** page. For authentication information, like account key or SAS token, go to **Access Keys** on the **Settings** pane. 
+2. For information like the account name, container, and file share name, go to the **Overview** page. 
+3. For authentication information, like account key or SAS token, go to **Access Keys** on the **Settings** pane. 
+
+4. For service principal items like, tenant ID and client ID, go to the **Overview** page of your **App registrations**. 
 
 > [!IMPORTANT]
-> If your storage account is in a virtual network, only the creation of an Azure blob datastore is supported. To grant your workspace access to your storage account, set the parameter `grant_workspace_access` to `True`.
+> If your storage account is in a virtual network, only creation of Blob, File share, ADLS Gen 1 and ADLS Gen 2 datastores **via the SDK** is supported. To grant your workspace access to your storage account, set the parameter `grant_workspace_access` to `True`.
 
 The following examples show how to register an Azure blob container, an Azure file share, and Azure Data Lake Storage Generation 2 as a datastore. For other storage services, please see the [reference documentation for the `register_azure_*` methods](https://docs.microsoft.com/python/api/azureml-core/azureml.core.datastore.datastore?view=azure-ml-py#methods).
 
@@ -132,7 +135,7 @@ file_datastore = Datastore.register_azure_file_share(workspace=ws,
 
 #### Azure Data Lake Storage Generation 2
 
-For an Azure Data Lake Storage Generation 2 (ADLS Gen 2) datastore, use [register_azure_data_lake_gen2()](https://docs.microsoft.com/python/api/azureml-core/azureml.core.datastore.datastore?view=azure-ml-py#register-azure-data-lake-gen2-workspace--datastore-name--filesystem--account-name--tenant-id--client-id--client-secret--resource-url-none--authority-url-none--protocol-none--endpoint-none--overwrite-false-) to register a credential datastore connected to an Azure DataLake Gen 2 storage with [service principal permissions](https://docs.microsoft.com/azure/active-directory/develop/howto-create-service-principal-portal). Learn more about [access control set up for ADLS Gen 2](https://docs.microsoft.com/azure/storage/blobs/data-lake-storage-access-control). 
+For an Azure Data Lake Storage Generation 2 (ADLS Gen 2) datastore, use [register_azure_data_lake_gen2()](https://docs.microsoft.com/python/api/azureml-core/azureml.core.datastore.datastore?view=azure-ml-py#register-azure-data-lake-gen2-workspace--datastore-name--filesystem--account-name--tenant-id--client-id--client-secret--resource-url-none--authority-url-none--protocol-none--endpoint-none--overwrite-false-) to register a credential datastore connected to an Azure DataLake Gen 2 storage with [service principal permissions](https://docs.microsoft.com/azure/active-directory/develop/howto-create-service-principal-portal). In order to utilize your service principal you need to [register your application](https://docs.microsoft.com/en-us/azure/active-directory/develop/app-objects-and-service-principals). Learn more about [access control set up for ADLS Gen 2](https://docs.microsoft.com/azure/storage/blobs/data-lake-storage-access-control). 
 
 The following code creates and registers the `adlsgen2_datastore_name` datastore to the `ws` workspace. This datastore accesses the file system `test` on the `account_name` storage account, by using the provided service principal credentials.
 
@@ -160,12 +163,19 @@ adlsgen2_datastore = Datastore.register_azure_data_lake_gen2(workspace=ws,
 
 Create a new datastore in a few steps in Azure Machine Learning studio:
 
+> [!IMPORTANT]
+> If your storage account is in a virtual network, only creation of datastores [via the SDK](#python-sdk) is supported. 
+
 1. Sign in to [Azure Machine Learning studio](https://ml.azure.com/).
 1. Select **Datastores** on the left pane under **Manage**.
 1. Select **+ New datastore**.
 1. Complete the form for a new datastore. The form intelligently updates itself based on your selections for Azure Storage type and authentication type.
 
-You can find the information that you need to populate the form on the  [Azure portal](https://portal.azure.com). Select **Storage Accounts** on the left pane, and choose the storage account that you want to register. The **Overview** page provides information such as the account name, container, and file share name. For authentication items, like account key or SAS token, go to **Account Keys** on the **Settings** pane.
+You can find the information that you need to populate the form on the  [Azure portal](https://portal.azure.com). Select **Storage Accounts** on the left pane, and choose the storage account that you want to register. The **Overview** page provides information such as the account name, container, and file share name. 
+
+* For authentication items, like account key or SAS token, go to **Account Keys** on the **Settings** pane. 
+
+* For service principal items like, tenant ID and client ID, go to the **Overview** page of your **App registrations**. 
 
 The following example demonstrates what the form looks like when you create an Azure blob datastore: 
 

articles/machine-learning/how-to-create-your-first-pipeline.md

@@ -357,6 +357,9 @@ iris_dataset = run_context.input_datasets['iris_data']
 dataframe = iris_dataset.to_pandas_dataframe()
 ```
 
+>[!NOTE]
+> All types of datasets (Blob, File Share, ADLS Gen 2, etc. ) can be used as input to any pipeline step, and output can be used in the DataTransferStep. However, writing output data (PipelineData)to ADLS Gen 2  is not supported. 
+
 For more information, see the [azure-pipeline-steps package](https://docs.microsoft.com/python/api/azureml-pipeline-steps/?view=azure-ml-py) and [Pipeline class](https://docs.microsoft.com/python/api/azureml-pipeline-core/azureml.pipeline.core.pipeline%28class%29?view=azure-ml-py) reference.
 
 ## Submit the pipeline

articles/machine-learning/how-to-train-with-datasets.md

@@ -25,7 +25,7 @@ In this article, you learn the two ways to consume [Azure Machine Learning datas
 
 - Option 2: If you have unstructured data, create a FileDataset and mount or download files to a remote compute for training.
 
-Azure Machine Learning datasets provide a seamless integration with Azure Machine Learning training products like [ScriptRun](https://docs.microsoft.com/python/api/azureml-core/azureml.core.scriptrun?view=azure-ml-py), [Estimator](https://docs.microsoft.com/python/api/azureml-train-core/azureml.train.estimator?view=azure-ml-py) and [HyperDrive](https://docs.microsoft.com/python/api/azureml-train-core/azureml.train.hyperdrive?view=azure-ml-py).
+Azure Machine Learning datasets provide a seamless integration with Azure Machine Learning training products like [ScriptRun](https://docs.microsoft.com/python/api/azureml-core/azureml.core.scriptrun?view=azure-ml-py), [Estimator](https://docs.microsoft.com/python/api/azureml-train-core/azureml.train.estimator?view=azure-ml-py), [HyperDrive](https://docs.microsoft.com/python/api/azureml-train-core/azureml.train.hyperdrive?view=azure-ml-py) and [Azure Machine Learning pipelines](how-to-create-your-first-pipeline.md).
 
 ## Prerequisites
 
@@ -98,11 +98,12 @@ experiment_run = experiment.submit(est)
 experiment_run.wait_for_completion(show_output=True)
 ```
 
+
 ## Option 2:  Mount files to a remote compute target
 
 If you want to make your data files available on the compute target for training, use [FileDataset](https://docs.microsoft.com/python/api/azureml-core/azureml.data.file_dataset.filedataset?view=azure-ml-py) to mount or download files referred by it.
 
-### Mount v.s. Download
+### Mount vs. Download
 When you mount a dataset, you attach the files referenced by the dataset to a directory (mount point) and make it available on the compute target. Mounting is supported for Linux-based computes, including Azure Machine Learning Compute, virtual machines, and HDInsight. If your data size exceeds the compute disk size, or you are only loading part of dataset in your script, mounting is recommended. Because downloading a dataset bigger than the disk size will fail, and mounting will only load the part of data used by your script at the time of processing. 
 
 When you download a dataset, all the files referenced by the dataset will be downloaded to the compute target. Downloading is supported for all compute types. If your script process all files referenced by the dataset, and your compute disk can fit in your full dataset, downloading is recommended to avoid the overhead of streaming data from storage services.
@@ -197,4 +198,4 @@ The [dataset notebooks](https://aka.ms/dataset-tutorial) demonstrate and expand
 
 * [Train image classification models](https://aka.ms/filedataset-samplenotebook) with FileDatasets
 
-* [Create and manage environments for training and deployment](how-to-use-environments.md)
+* [Train with datasets using pipelines](https://github.com/Azure/MachineLearningNotebooks/blob/master/how-to-use-azureml/work-with-data/datasets-tutorial/pipeline-with-datasets/pipeline-for-image-classification.ipynb)