Reflect not supporting deletion of complex types

Author: gmndrg

articles/search/search-howto-index-cosmosdb-gremlin.md

@@ -9,7 +9,7 @@ manager: nitinme
 
 ms.service: cognitive-search
 ms.topic: how-to
-ms.date: 07/12/2022
+ms.date: 09/08/2022
 ---
 
 # Index data from Azure Cosmos DB using the Gremlin API
@@ -297,6 +297,9 @@ api-key: [Search service admin key]
 }
 ```
 
+Even if you enable deletion detection policy, deleting complex (`Edm.ComplexType`) fields from the index is not supported. This policy requires that the 'active' column in the Gremlin database to be of type integer, string or boolean.
+
+
 <a name="MappingGraphData"></a>
 
 ## Mapping graph data to fields in a search index