diff --git a/sdk/search/azure-search-documents/CHANGELOG.md b/sdk/search/azure-search-documents/CHANGELOG.md
index b2b387e291f7..220b27aae6c8 100644
--- a/sdk/search/azure-search-documents/CHANGELOG.md
+++ b/sdk/search/azure-search-documents/CHANGELOG.md
@@ -4,9 +4,10 @@
 
 ### Features Added
 
-### Breaking Changes
-
-### Bugs Fixed
+- Added properties to `SearchClient.search`: `session_id`, `scoring_statistics`.
+- Added properties to `SearchIndexerDataSourceConnection`: `identity`, `encryption_key`.
+- Added `select` property to the following `SearchIndexClient` operations: `get_synonym_maps`, `list_indexes`.
+- Added `select` property to the following `SearchIndexersClient` operations: `get_data_source_connections`, `get_indexers`, `get_skillsets`.
 
 ### Other Changes
 
diff --git a/sdk/search/azure-search-documents/azure/search/documents/_search_client.py b/sdk/search/azure-search-documents/azure/search/documents/_search_client.py
index 79fce398aad8..d7801844bb31 100644
--- a/sdk/search/azure-search-documents/azure/search/documents/_search_client.py
+++ b/sdk/search/azure-search-documents/azure/search/documents/_search_client.py
@@ -226,6 +226,18 @@ def search(self, search_text, **kwargs): # pylint:disable=too-many-locals
          $skip to implement client-side paging of search results. If results are truncated due to
          server-side paging, the response will include a continuation token that can be used to issue
          another Search request for the next page of results.
+        :keyword scoring_statistics: A value that specifies whether we want to calculate scoring
+         statistics (such as document frequency) globally for more consistent scoring, or locally, for
+         lower latency. The default is 'local'. Use 'global' to aggregate scoring statistics globally
+         before scoring. Using global scoring statistics can increase latency of search queries.
+         Possible values include: "local", "global".
+        :paramtype scoring_statistics: str or ~azure.search.documents.models.ScoringStatistics
+        :keyword str session_id: A value to be used to create a sticky session, which can help getting more
+         consistent results. As long as the same sessionId is used, a best-effort attempt will be made
+         to target the same replica set. Be wary that reusing the same sessionID values repeatedly can
+         interfere with the load balancing of the requests across replicas and adversely affect the
+         performance of the search service. The value used as sessionId cannot start with a '_'
+         character.
         :rtype:  SearchItemPaged[dict]
 
         .. admonition:: Example:
@@ -274,6 +286,8 @@ def search(self, search_text, **kwargs): # pylint:disable=too-many-locals
         select = kwargs.pop("select", None)
         skip = kwargs.pop("skip", None)
         top = kwargs.pop("top", None)
+        session_id = kwargs.pop("session_id", None)
+        scoring_statistics = kwargs.pop("scoring_statistics", None)
 
         query_answer = kwargs.pop("query_answer", None)
         query_answer_count = kwargs.pop("query_answer_count", None)
@@ -312,6 +326,8 @@ def search(self, search_text, **kwargs): # pylint:disable=too-many-locals
             select=select if isinstance(select, six.string_types) else None,
             skip=skip,
             top=top,
+            session_id=session_id,
+            scoring_statistics=scoring_statistics
         )
         if isinstance(select, list):
             query.select(select)
diff --git a/sdk/search/azure-search-documents/azure/search/documents/aio/_search_client_async.py b/sdk/search/azure-search-documents/azure/search/documents/aio/_search_client_async.py
index 65a51b4610da..fafa78592533 100644
--- a/sdk/search/azure-search-documents/azure/search/documents/aio/_search_client_async.py
+++ b/sdk/search/azure-search-documents/azure/search/documents/aio/_search_client_async.py
@@ -205,6 +205,19 @@ async def search(self, search_text, **kwargs): # pylint:disable=too-many-locals
          $skip to implement client-side paging of search results. If results are truncated due to
          server-side paging, the response will include a continuation token that can be used to issue
          another Search request for the next page of results.
+        :keyword scoring_statistics: A value that specifies whether we want to calculate scoring
+        statistics (such as document frequency) globally for more consistent scoring, or locally, for
+        lower latency. The default is 'local'. Use 'global' to aggregate scoring statistics globally
+        before scoring. Using global scoring statistics can increase latency of search queries.
+        Possible values include: "local", "global".
+        :paramtype scoring_statistics: str or ~azure.search.documents.models.ScoringStatistics
+        :keyword session_id: A value to be used to create a sticky session, which can help getting more
+        consistent results. As long as the same sessionId is used, a best-effort attempt will be made
+        to target the same replica set. Be wary that reusing the same sessionID values repeatedly can
+        interfere with the load balancing of the requests across replicas and adversely affect the
+        performance of the search service. The value used as sessionId cannot start with a '_'
+        character.
+        :paramtype session_id: str
         :rtype:  AsyncSearchItemPaged[dict]
 
         .. admonition:: Example:
@@ -253,6 +266,8 @@ async def search(self, search_text, **kwargs): # pylint:disable=too-many-locals
         select = kwargs.pop("select", None)
         skip = kwargs.pop("skip", None)
         top = kwargs.pop("top", None)
+        session_id = kwargs.pop("session_id", None)
+        scoring_statistics = kwargs.pop("scoring_statistics", None)
 
         query_answer = kwargs.pop("query_answer", None)
         query_answer_count = kwargs.pop("query_answer_count", None)
@@ -291,6 +306,8 @@ async def search(self, search_text, **kwargs): # pylint:disable=too-many-locals
             select=select if isinstance(select, six.string_types) else None,
             skip=skip,
             top=top,
+            session_id=session_id,
+            scoring_statistics=scoring_statistics
         )
         if isinstance(select, list):
             query.select(select)
diff --git a/sdk/search/azure-search-documents/azure/search/documents/indexes/_search_index_client.py b/sdk/search/azure-search-documents/azure/search/documents/indexes/_search_index_client.py
index fa5906f32b53..e01be47a27e2 100644
--- a/sdk/search/azure-search-documents/azure/search/documents/indexes/_search_index_client.py
+++ b/sdk/search/azure-search-documents/azure/search/documents/indexes/_search_index_client.py
@@ -97,12 +97,18 @@ def list_indexes(self, **kwargs):
         # type: (**Any) -> ItemPaged[SearchIndex]
         """List the indexes in an Azure Search service.
 
+        :keyword select: Selects which top-level properties of the skillsets to retrieve. Specified as a
+         list of JSON property names, or '*' for all properties. The default is all
+         properties.
+        :paramtype select: list[str]
         :return: List of indexes
         :rtype: ~azure.core.paging.ItemPaged[~azure.search.documents.indexes.models.SearchIndex]
         :raises: ~azure.core.exceptions.HttpResponseError
 
         """
         kwargs["headers"] = self._merge_client_headers(kwargs.get("headers"))
+        if kwargs.get('select', None):
+            kwargs['select'] = ','.join(kwargs['select'])
         # pylint:disable=protected-access
         return self._client.indexes.list(
             cls=lambda objs: [SearchIndex._from_generated(x) for x in objs], **kwargs
@@ -306,6 +312,10 @@ def get_synonym_maps(self, **kwargs):
         # type: (**Any) -> List[SynonymMap]
         """List the Synonym Maps in an Azure Search service.
 
+        :keyword select: Selects which top-level properties of the skillsets to retrieve. Specified as a
+         list of JSON property names, or '*' for all properties. The default is all
+         properties.
+        :paramtype select: list[str]
         :return: List of synonym maps
         :rtype: list[~azure.search.documents.indexes.models.SynonymMap]
         :raises: ~azure.core.exceptions.HttpResponseError
@@ -321,6 +331,8 @@ def get_synonym_maps(self, **kwargs):
 
         """
         kwargs["headers"] = self._merge_client_headers(kwargs.get("headers"))
+        if kwargs.get('select', None):
+            kwargs['select'] = ','.join(kwargs['select'])
         result = self._client.synonym_maps.list(**kwargs)
         # pylint:disable=protected-access
         return [SynonymMap._from_generated(x) for x in result.synonym_maps]
diff --git a/sdk/search/azure-search-documents/azure/search/documents/indexes/_search_indexer_client.py b/sdk/search/azure-search-documents/azure/search/documents/indexes/_search_indexer_client.py
index c7e55716c554..03c351a68f3a 100644
--- a/sdk/search/azure-search-documents/azure/search/documents/indexes/_search_indexer_client.py
+++ b/sdk/search/azure-search-documents/azure/search/documents/indexes/_search_indexer_client.py
@@ -161,6 +161,10 @@ def get_indexers(self, **kwargs):
         # type: (**Any) -> Sequence[SearchIndexer]
         """Lists all indexers available for a search service.
 
+        :keyword select: Selects which top-level properties of the skillsets to retrieve. Specified as a
+         list of JSON property names, or '*' for all properties. The default is all
+         properties.
+        :paramtype select: list[str]
         :return: List of all the SearchIndexers.
         :rtype: `list[~azure.search.documents.indexes.models.SearchIndexer]`
 
@@ -174,6 +178,8 @@ def get_indexers(self, **kwargs):
                 :caption: List all the SearchIndexers
         """
         kwargs["headers"] = self._merge_client_headers(kwargs.get("headers"))
+        if kwargs.get('select', None):
+            kwargs['select'] = ','.join(kwargs['select'])
         result = self._client.indexers.list(**kwargs)
         return result.indexers
 
@@ -390,6 +396,10 @@ def get_data_source_connections(self, **kwargs):
         # type: (**Any) -> Sequence[SearchIndexerDataSourceConnection]
         """Lists all data source connections available for a search service.
 
+        :keyword select: Selects which top-level properties of the skillsets to retrieve. Specified as a
+         list of JSON property names, or '*' for all properties. The default is all
+         properties.
+        :paramtype select: list[str]
         :return: List of all the data source connections.
         :rtype: `list[~azure.search.documents.indexes.models.SearchIndexerDataSourceConnection]`
 
@@ -403,6 +413,8 @@ def get_data_source_connections(self, **kwargs):
                 :caption: List all the SearchIndexerDataSourceConnections
         """
         kwargs["headers"] = self._merge_client_headers(kwargs.get("headers"))
+        if kwargs.get('select', None):
+            kwargs['select'] = ','.join(kwargs['select'])
         result = self._client.data_sources.list(**kwargs)
         # pylint:disable=protected-access
         return [
@@ -465,6 +477,10 @@ def get_skillsets(self, **kwargs):
         # type: (**Any) -> List[SearchIndexerSkillset]
         """List the SearchIndexerSkillsets in an Azure Search service.
 
+        :keyword select: Selects which top-level properties of the skillsets to retrieve. Specified as a
+         list of JSON property names, or '*' for all properties. The default is all
+         properties.
+        :paramtype select: list[str]
         :return: List of SearchIndexerSkillsets
         :rtype: list[~azure.search.documents.indexes.models.SearchIndexerSkillset]
         :raises: ~azure.core.exceptions.HttpResponseError
@@ -480,6 +496,8 @@ def get_skillsets(self, **kwargs):
 
         """
         kwargs["headers"] = self._merge_client_headers(kwargs.get("headers"))
+        if kwargs.get('select', None):
+            kwargs['select'] = ','.join(kwargs['select'])
         result = self._client.skillsets.list(**kwargs)
         return [SearchIndexerSkillset._from_generated(skillset) for skillset in result.skillsets] # pylint:disable=protected-access
 
diff --git a/sdk/search/azure-search-documents/azure/search/documents/indexes/aio/_search_index_client.py b/sdk/search/azure-search-documents/azure/search/documents/indexes/aio/_search_index_client.py
index d20618583fd2..27e51a82357b 100644
--- a/sdk/search/azure-search-documents/azure/search/documents/indexes/aio/_search_index_client.py
+++ b/sdk/search/azure-search-documents/azure/search/documents/indexes/aio/_search_index_client.py
@@ -103,13 +103,18 @@ def list_indexes(self, **kwargs):
         # type: (**Any) -> AsyncItemPaged[SearchIndex]
         """List the indexes in an Azure Search service.
 
+        :keyword select: Selects which top-level properties of the skillsets to retrieve. Specified as a
+         list of JSON property names, or '*' for all properties. The default is all
+         properties.
+        :paramtype select: list[str]
         :return: List of indexes
         :rtype: ~azure.core.async_paging.AsyncItemPaged[:class:`~azure.search.documents.indexes.models.SearchIndex`]
         :raises: ~azure.core.exceptions.HttpResponseError
 
         """
         kwargs["headers"] = self._merge_client_headers(kwargs.get("headers"))
-
+        if kwargs.get('select', None):
+            kwargs['select'] = ','.join(kwargs['select'])
         # pylint:disable=protected-access
         return self._client.indexes.list(
             cls=lambda objs: [SearchIndex._from_generated(x) for x in objs], **kwargs
@@ -313,6 +318,10 @@ async def get_synonym_maps(self, **kwargs):
         # type: (**Any) -> List[SynonymMap]
         """List the Synonym Maps in an Azure Search service.
 
+        :keyword select: Selects which top-level properties of the skillsets to retrieve. Specified as a
+         list of JSON property names, or '*' for all properties. The default is all
+         properties.
+        :paramtype select: list[str]
         :return: List of synonym maps
         :rtype: list[~azure.search.documents.indexes.models.SynonymMap]
         :raises: ~azure.core.exceptions.HttpResponseError
@@ -328,6 +337,8 @@ async def get_synonym_maps(self, **kwargs):
 
         """
         kwargs["headers"] = self._merge_client_headers(kwargs.get("headers"))
+        if kwargs.get('select', None):
+            kwargs['select'] = ','.join(kwargs['select'])
         result = await self._client.synonym_maps.list(**kwargs)
         # pylint:disable=protected-access
         return [SynonymMap._from_generated(x) for x in result.synonym_maps]
diff --git a/sdk/search/azure-search-documents/azure/search/documents/indexes/aio/_search_indexer_client.py b/sdk/search/azure-search-documents/azure/search/documents/indexes/aio/_search_indexer_client.py
index d0e589f9a39e..92f986603834 100644
--- a/sdk/search/azure-search-documents/azure/search/documents/indexes/aio/_search_indexer_client.py
+++ b/sdk/search/azure-search-documents/azure/search/documents/indexes/aio/_search_indexer_client.py
@@ -162,6 +162,10 @@ async def get_indexers(self, **kwargs):
         # type: (**Any) -> Sequence[SearchIndexer]
         """Lists all indexers available for a search service.
 
+        :keyword select: Selects which top-level properties of the skillsets to retrieve. Specified as a
+         list of JSON property names, or '*' for all properties. The default is all
+         properties.
+        :paramtype select: list[str]
         :return: List of all the SearchIndexers.
         :rtype: `list[~azure.search.documents.indexes.models.SearchIndexer]`
 
@@ -175,6 +179,8 @@ async def get_indexers(self, **kwargs):
                 :caption: List all the SearchIndexers
         """
         kwargs["headers"] = self._merge_client_headers(kwargs.get("headers"))
+        if kwargs.get('select', None):
+            kwargs['select'] = ','.join(kwargs['select'])
         result = await self._client.indexers.list(**kwargs)
         return result.indexers
 
@@ -393,6 +399,10 @@ async def get_data_source_connection(self, name, **kwargs):
         # type: (str, **Any) -> SearchIndexerDataSourceConnection
         """Retrieves a data source connection definition.
 
+        :keyword select: Selects which top-level properties of the skillsets to retrieve. Specified as a
+         list of JSON property names, or '*' for all properties. The default is all
+         properties.
+        :paramtype select: list[str]
         :param name: The name of the data source connection to retrieve.
         :type name: str
         :return: The SearchIndexerDataSourceConnection that is fetched.
@@ -406,6 +416,8 @@ async def get_data_source_connection(self, name, **kwargs):
                 :caption: Retrieve a SearchIndexerDataSourceConnection
         """
         kwargs["headers"] = self._merge_client_headers(kwargs.get("headers"))
+        if kwargs.get('select', None):
+            kwargs['select'] = ','.join(kwargs['select'])
         result = await self._client.data_sources.get(name, **kwargs)
         # pylint:disable=protected-access
         return SearchIndexerDataSourceConnection._from_generated(result)
@@ -453,6 +465,10 @@ async def get_skillsets(self, **kwargs):
         # type: (**Any) -> List[SearchIndexerSkillset]
         """List the SearchIndexerSkillsets in an Azure Search service.
 
+        :keyword select: Selects which top-level properties of the skillsets to retrieve. Specified as a
+         list of JSON property names, or '*' for all properties. The default is all
+         properties.
+        :paramtype select: list[str]
         :return: List of SearchIndexerSkillsets
         :rtype: list[~azure.search.documents.indexes.models.SearchIndexerSkillset]
         :raises: ~azure.core.exceptions.HttpResponseError
@@ -468,6 +484,8 @@ async def get_skillsets(self, **kwargs):
 
         """
         kwargs["headers"] = self._merge_client_headers(kwargs.get("headers"))
+        if kwargs.get('select', None):
+            kwargs['select'] = ','.join(kwargs['select'])
         result = await self._client.skillsets.list(**kwargs)
         return [SearchIndexerSkillset._from_generated(skillset) for skillset in result.skillsets] # pylint:disable=protected-access
 
diff --git a/sdk/search/azure-search-documents/azure/search/documents/indexes/models/_models.py b/sdk/search/azure-search-documents/azure/search/documents/indexes/models/_models.py
index 9a88f0e0b1b7..5800abac4e3c 100644
--- a/sdk/search/azure-search-documents/azure/search/documents/indexes/models/_models.py
+++ b/sdk/search/azure-search-documents/azure/search/documents/indexes/models/_models.py
@@ -849,6 +849,21 @@ class SearchIndexerDataSourceConnection(msrest.serialization.Model):
      ~azure.search.documents.models.DataDeletionDetectionPolicy
     :keyword e_tag: The ETag of the data source.
     :paramtype e_tag: str
+    :keyword identity: An explicit managed identity to use for this datasource. If not specified and
+     the connection string is a managed identity, the system-assigned managed identity is used. If
+     not specified, the value remains unchanged. If "none" is specified, the value of this property
+     is cleared.
+    :paramtype identity: ~azure.search.documents.indexes.models.SearchIndexerDataIdentity
+    :keyword encryption_key: A description of an encryption key that you create in Azure Key Vault.
+     This key is used to provide an additional level of encryption-at-rest for your datasource
+     definition when you want full assurance that no one, not even Microsoft, can decrypt your data
+     source definition in Azure Cognitive Search. Once you have encrypted your data source
+     definition, it will always remain encrypted. Azure Cognitive Search will ignore attempts to set
+     this property to null. You can change this property as needed if you want to rotate your
+     encryption key; Your datasource definition will be unaffected. Encryption with customer-managed
+     keys is not available for free search services, and is only available for paid services created
+     on or after January 1, 2019.
+    :paramtype encryption_key: ~azure.search.documents.indexes.models.SearchResourceEncryptionKey
     """
 
     _validation = {
@@ -872,7 +887,9 @@ class SearchIndexerDataSourceConnection(msrest.serialization.Model):
             "key": "dataDeletionDetectionPolicy",
             "type": "DataDeletionDetectionPolicy",
         },
+        'encryption_key': {'key': 'encryptionKey', 'type': 'SearchResourceEncryptionKey'},
         "e_tag": {"key": "@odata\\.etag", "type": "str"},
+        'identity': {'key': 'identity', 'type': 'SearchIndexerDataIdentity'},
     }
 
     def __init__(self, **kwargs):
@@ -889,6 +906,8 @@ def __init__(self, **kwargs):
             "data_deletion_detection_policy", None
         )
         self.e_tag = kwargs.get("e_tag", None)
+        self.encryption_key = kwargs.get("encryption_key", None)
+        self.identity = kwargs.get("identity", None)
 
     def _to_generated(self):
         if self.connection_string is None or self.connection_string == "":
@@ -905,6 +924,8 @@ def _to_generated(self):
             data_change_detection_policy=self.data_change_detection_policy,
             data_deletion_detection_policy=self.data_deletion_detection_policy,
             e_tag=self.e_tag,
+            encryption_key=self.encryption_key,
+            identity=self.identity
         )
 
     @classmethod
@@ -925,6 +946,8 @@ def _from_generated(cls, search_indexer_data_source):
             data_change_detection_policy=search_indexer_data_source.data_change_detection_policy,
             data_deletion_detection_policy=search_indexer_data_source.data_deletion_detection_policy,
             e_tag=search_indexer_data_source.e_tag,
+            encryption_key=search_indexer_data_source.encryption_key,
+            identity=search_indexer_data_source.identity
         )
 
 
diff --git a/sdk/search/azure-search-documents/azure/search/documents/models/__init__.py b/sdk/search/azure-search-documents/azure/search/documents/models/__init__.py
index c93b4ac66b9c..23213d7bb771 100644
--- a/sdk/search/azure-search-documents/azure/search/documents/models/__init__.py
+++ b/sdk/search/azure-search-documents/azure/search/documents/models/__init__.py
@@ -35,7 +35,8 @@
     QueryLanguage,
     QuerySpellerType,
     QueryType,
-    SearchMode,
+    ScoringStatistics,
+    SearchMode
 )
 from .._search_client import odata
 
@@ -52,5 +53,6 @@
     "QueryLanguage",
     "QuerySpellerType",
     "QueryType",
+    "ScoringStatistics",
     "SearchMode",
 )