Add release notes for EDS

Author: Bharathi Selvaraj

articles/energy-data-services/how-to-enable-eds.md

@@ -57,9 +57,18 @@ To enable External Data Source Preview on your Azure Data Manager for Energy, cr
 > 
 > EDS Preview will be enabled only on the Developer Tier. 
 
+We notify you once EDS preview is enabled in your Azure Data Manager for Energy resource.
 
+## Known issues
+- Below issues are specific to [OSDU™](https://osduforum.org/) M18 release: 
+    - EDS ingest DAG results in failures when the data supplier’s wrapper Search service is unavailable. 
+    - EDS Dataset service response provides an empty response when data supplier’s Dataset wrapper service is unavailable. 
+    - Secret service responds with 5xx HTTP response code instead of 4xx in some cases. For example, 
+        - When an application tries to recover a deleted secret, which isn't deleted. 
+        - When an application tries to get an invalid deleted secret. 
 
-We notify you once EDS preview is enabled in your Azure Data Manager for Energy resource.
+## Limitations
+Some EDS capabilities like **Naturalization, Reverse Naturalization, Reference data mapping** are unavailable in the M18 [OSDU™](https://osduforum.org/) release (available in later releases), and hence unavailable in Azure Data Manager for Energy M18 release. These features will be available once we upgrade to subsequent [OSDU™](https://osduforum.org/) milestone release.
 
 > [!div class="nextstepaction"]
 > [How to register an external data source with Azure Data Manager for Energy?](how-to-register-eds.md)

articles/energy-data-services/release-notes.md

@@ -28,6 +28,11 @@ This page is updated with the details about the upcoming release approximately a
 ### Azure Data Manager for Energy in Australia East Region
 Azure Data Manager for Energy is now available in the Australia East Region. This new region is enabled for both the Standard and Developer tiers of Azure Data Manager for Energy. You can now select Australia East as your preferred region when creating Azure Data Manage for Energy resource, using the [Azure portal](https://ms.portal.azure.com/#create/Microsoft.AzureDataManagerforEnergy).
 
+### External Data Services (Preview)
+External Data Sources (EDS) allows data from an [OSDU™](https://osduforum.org/) compliant external data source to be shared with an Azure Data Manager for Energy resource. EDS is designed to pull specified data (metadata) from OSDU-compliant data sources via scheduled jobs while leaving associated dataset files (LAS, SEG-Y, etc.) stored at the external source for retrieval on demand.
+
+EDS M18 community release is available as a preview feature on Azure Data Manager for Energy (Developer tier). For details, see [How to enable External Data Services (EDS) Preview?](how-to-enable-eds.md)
+
 ## November 2023
 
 ### Compliant with M18 OSDU™ release