Merge pull request #104417 from diberry/diberry/qna-metadata-lowercase

[Cogsvcs] QnA Maker - lowercase metadata

Author: PRMerger6

articles/cognitive-services/QnAMaker/limits.md

@@ -2,7 +2,7 @@
 title: Limits and boundaries - QnA Maker
 description: QnA Maker has meta-limits for parts of the knowledge base and service. It is important to keep your knowledge base within those limits in order to test and publish.
 ms.topic: article
-ms.date: 01/23/2020
+ms.date: 02/14/2020
 ---
 
 # QnA Maker knowledge base limits and boundaries
@@ -50,6 +50,8 @@ The maximum number of deep-links that can be crawled for extraction of QnAs from
 
 ## Metadata Limits
 
+Metadata is stored and compared in lower case.
+
 ### By Azure Cognitive Search pricing tier
 
 Maximum number of metadata fields per knowledge base is based on your **[Azure Cognitive Search tier limits](https://docs.microsoft.com/azure/search/search-limits-quotas-capacity)**.