+3.4 Update Automation Composition Instance
+------------------------------------------
+The user requests the AC Instance to be updated using a REST endpoint. The ACM Runtime orders the AC Instance to be updated.
+
+.. image:: ../images/system-dialogues/UpdateAcInstance.png
+
+Each participant updates its AC Element from the AC Instance
+
+.. image:: ../images/system-dialogues/UpdateAcElements.png
+
+The ACM Runtime receives and stores the responses.
+
+.. image:: ../images/system-dialogues/UpdateAcElementsResponse.png
+
+3.5 Undeploy Automation Composition Instance