diff --git a/libraries/botbuilder-core/botbuilder/core/teams/teams_info.py b/libraries/botbuilder-core/botbuilder/core/teams/teams_info.py
index b70fe256f..ca1e71a43 100644
--- a/libraries/botbuilder-core/botbuilder/core/teams/teams_info.py
+++ b/libraries/botbuilder-core/botbuilder/core/teams/teams_info.py
@@ -110,7 +110,10 @@ async def _get_members(
         )
 
         for member in members:
-            new_account_json = member.serialize()
-            teams_members.append(TeamsChannelAccount(**new_account_json))
+            teams_members.append(
+                TeamsChannelAccount().deserialize(
+                    dict(member.serialize(), **member.additional_properties)
+                )
+            )
 
         return teams_members
diff --git a/libraries/botbuilder-schema/botbuilder/schema/teams/_models_py3.py b/libraries/botbuilder-schema/botbuilder/schema/teams/_models_py3.py
index 62d1e4a6f..529ab6851 100644
--- a/libraries/botbuilder-schema/botbuilder/schema/teams/_models_py3.py
+++ b/libraries/botbuilder-schema/botbuilder/schema/teams/_models_py3.py
@@ -1798,6 +1798,7 @@ class TeamsChannelAccount(ChannelAccount):
         "surname": {"key": "surname", "type": "str"},
         "email": {"key": "email", "type": "str"},
         "user_principal_name": {"key": "userPrincipalName", "type": "str"},
+        "aad_object_id": {"key": "objectId", "type": "str"},
     }
 
     def __init__(
@@ -1815,7 +1816,6 @@ def __init__(
         self.given_name = given_name
         self.surname = surname
         self.email = email
-        # changing to camel case due to how data comes in off the wire
         self.user_principal_name = user_principal_name