diff --git a/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/form_recognizer_client.py b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/form_recognizer_client.py
index 22db48af28ea..4d5b73245cd3 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/form_recognizer_client.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/form_recognizer_client.py
@@ -73,7 +73,7 @@ def __init__(
 
 
     def train_custom_model(
-            self, source, custom_headers=None, raw=False, **operation_config):
+            self, source, source_filter=None, custom_headers=None, raw=False, **operation_config):
         """Train Model.
 
         Create and train a custom model. The train request must include a
@@ -92,6 +92,10 @@ def train_custom_model(
 
         :param source: Get or set source path.
         :type source: str
+        :param source_filter: Get or set filter to further search the
+         source path for content.
+        :type source_filter:
+         ~azure.cognitiveservices.formrecognizer.models.TrainSourceFilter
         :param dict custom_headers: headers that will be added to the request
         :param bool raw: returns the direct response alongside the
          deserialized response
@@ -103,7 +107,7 @@ def train_custom_model(
         :raises:
          :class:`ErrorResponseException<azure.cognitiveservices.formrecognizer.models.ErrorResponseException>`
         """
-        train_request = models.TrainRequest(source=source)
+        train_request = models.TrainRequest(source=source, source_filter=source_filter)
 
         # Construct URL
         url = self.train_custom_model.metadata['url']
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/__init__.py b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/__init__.py
index dd715045ff1b..d409491013c6 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/__init__.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/__init__.py
@@ -10,6 +10,7 @@
 # --------------------------------------------------------------------------
 
 try:
+    from .train_source_filter_py3 import TrainSourceFilter
     from .train_request_py3 import TrainRequest
     from .form_document_report_py3 import FormDocumentReport
     from .form_operation_error_py3 import FormOperationError
@@ -38,6 +39,7 @@
     from .computer_vision_error_py3 import ComputerVisionError, ComputerVisionErrorException
     from .image_url_py3 import ImageUrl
 except (SyntaxError, ImportError):
+    from .train_source_filter import TrainSourceFilter
     from .train_request import TrainRequest
     from .form_document_report import FormDocumentReport
     from .form_operation_error import FormOperationError
@@ -72,6 +74,7 @@
 )
 
 __all__ = [
+    'TrainSourceFilter',
     'TrainRequest',
     'FormDocumentReport',
     'FormOperationError',
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_request.py b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_request.py
index b29c8b6e02eb..371f70939092 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_request.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_request.py
@@ -19,6 +19,10 @@ class TrainRequest(Model):
 
     :param source: Required. Get or set source path.
     :type source: str
+    :param source_filter: Get or set filter to further search the
+     source path for content.
+    :type source_filter:
+     ~azure.cognitiveservices.formrecognizer.models.TrainSourceFilter
     """
 
     _validation = {
@@ -27,8 +31,10 @@ class TrainRequest(Model):
 
     _attribute_map = {
         'source': {'key': 'source', 'type': 'str'},
+        'source_filter': {'key': 'sourceFilter', 'type': 'TrainSourceFilter'},
     }
 
     def __init__(self, **kwargs):
         super(TrainRequest, self).__init__(**kwargs)
         self.source = kwargs.get('source', None)
+        self.source_filter = kwargs.get('source_filter', None)
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_request_py3.py b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_request_py3.py
index e32bbf06cad1..3e08a8464e8e 100644
--- a/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_request_py3.py
+++ b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_request_py3.py
@@ -19,6 +19,10 @@ class TrainRequest(Model):
 
     :param source: Required. Get or set source path.
     :type source: str
+    :param source_filter: Get or set filter to further search the
+     source path for content.
+    :type source_filter:
+     ~azure.cognitiveservices.formrecognizer.models.TrainSourceFilter
     """
 
     _validation = {
@@ -27,8 +31,10 @@ class TrainRequest(Model):
 
     _attribute_map = {
         'source': {'key': 'source', 'type': 'str'},
+        'source_filter': {'key': 'sourceFilter', 'type': 'TrainSourceFilter'},
     }
 
-    def __init__(self, *, source: str, **kwargs) -> None:
+    def __init__(self, *, source: str, source_filter=None, **kwargs) -> None:
         super(TrainRequest, self).__init__(**kwargs)
         self.source = source
+        self.source_filter = source_filter
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_source_filter.py b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_source_filter.py
new file mode 100644
index 000000000000..5ed9aad65dca
--- /dev/null
+++ b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_source_filter.py
@@ -0,0 +1,41 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+from msrest.serialization import Model
+
+
+class TrainSourceFilter(Model):
+    """Filters to be applied when traversing a data source.
+
+    :param prefix: A case-sensitive prefix string to filter content
+     under the source location. For e.g., when using a Azure Blob
+     Uri use the prefix to restrict subfolders for content.
+    :type prefix: str
+    :param include_sub_folders: A flag to indicate if sub folders within the
+     set of
+     prefix folders will also need to be included when searching
+     for content to be preprocessed.
+    :type include_sub_folders: bool
+    """
+
+    _validation = {
+        'prefix': {'max_length': 128, 'min_length': 0},
+    }
+
+    _attribute_map = {
+        'prefix': {'key': 'prefix', 'type': 'str'},
+        'include_sub_folders': {'key': 'includeSubFolders', 'type': 'bool'},
+    }
+
+    def __init__(self, **kwargs):
+        super(TrainSourceFilter, self).__init__(**kwargs)
+        self.prefix = kwargs.get('prefix', None)
+        self.include_sub_folders = kwargs.get('include_sub_folders', None)
diff --git a/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_source_filter_py3.py b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_source_filter_py3.py
new file mode 100644
index 000000000000..f6469269d7df
--- /dev/null
+++ b/sdk/cognitiveservices/azure-cognitiveservices-formrecognizer/azure/cognitiveservices/formrecognizer/models/train_source_filter_py3.py
@@ -0,0 +1,41 @@
+# coding=utf-8
+# --------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for
+# license information.
+#
+# Code generated by Microsoft (R) AutoRest Code Generator.
+# Changes may cause incorrect behavior and will be lost if the code is
+# regenerated.
+# --------------------------------------------------------------------------
+
+from msrest.serialization import Model
+
+
+class TrainSourceFilter(Model):
+    """Filters to be applied when traversing a data source.
+
+    :param prefix: A case-sensitive prefix string to filter content
+     under the source location. For e.g., when using a Azure Blob
+     Uri use the prefix to restrict subfolders for content.
+    :type prefix: str
+    :param include_sub_folders: A flag to indicate if sub folders within the
+     set of
+     prefix folders will also need to be included when searching
+     for content to be preprocessed.
+    :type include_sub_folders: bool
+    """
+
+    _validation = {
+        'prefix': {'max_length': 128, 'min_length': 0},
+    }
+
+    _attribute_map = {
+        'prefix': {'key': 'prefix', 'type': 'str'},
+        'include_sub_folders': {'key': 'includeSubFolders', 'type': 'bool'},
+    }
+
+    def __init__(self, *, prefix: str=None, include_sub_folders: bool=None, **kwargs) -> None:
+        super(TrainSourceFilter, self).__init__(**kwargs)
+        self.prefix = prefix
+        self.include_sub_folders = include_sub_folders