diff --git a/sdk/datamigration/azure-mgmt-datamigration/HISTORY.rst b/sdk/datamigration/azure-mgmt-datamigration/HISTORY.rst
index 41f434607ced..78e3841fb783 100644
--- a/sdk/datamigration/azure-mgmt-datamigration/HISTORY.rst
+++ b/sdk/datamigration/azure-mgmt-datamigration/HISTORY.rst
@@ -3,13 +3,25 @@
 Release History
 ===============
 
-2.3.0 (2019-07-12)
+3.0.0 (2019-07-12)
 ++++++++++++++++++
 
 **Features**
 
 - Added operation group ServiceTasksOperations
 
+**General Breaking changes**
+
+This version uses a next-generation code generator that *might* introduce breaking changes if from some import.
+In summary, some modules were incorrectly visible/importable and have been renamed. This fixed several issues caused by usage of classes that were not supposed to be used in the first place.
+
+- HanaManagementClient cannot be imported from `azure.mgmt.hanaonazure.hana_management_client` anymore (import from `azure.mgmt.hanaonazure` works like before)
+- HanaManagementClientConfiguration import has been moved from `azure.mgmt.hanaonazure.hana_management_client` to `azure.mgmt.hanaonazure`
+- A model `MyClass` from a "models" sub-module cannot be imported anymore using `azure.mgmt.hanaonazure.models.my_class` (import from `azure.mgmt.hanaonazure.models` works like before)
+- An operation class `MyClassOperations` from an `operations` sub-module cannot be imported anymore using `azure.mgmt.hanaonazure.operations.my_class_operations` (import from `azure.mgmt.hanaonazure.operations` works like before)
+
+Last but not least, HTTP connection pooling is now enabled by default. You should always use a client as a context manager, or call close(), or use no more than one client per process.
+
 2.2.0 (2019-05-21)
 ++++++++++++++++++