FAQ converted into yml (SharePoint#7064)

* FAQ converted into yml

* warning fixed

* fixed

* .md removed

* blank description added in Metadata

* waing fixed

* warning fixed

* conflict solved

Author: v-hearya

docs/general-development/excel-services-overview.md

@@ -1,5 +1,6 @@
 ---
 title: Excel Services Overview
+description: "Excel Services is a service application that enables you to load, calculate, and display Microsoft Excel workbooks on Microsoft SharePoint."
 ms.date: 09/25/2017
 ms.prod: sharepoint
 ms.assetid: 5fa22ebb-e507-4ffc-a425-e755502feae2
@@ -283,7 +284,7 @@ From there you can use OData system query options to get specific information ab
 -  [Walkthrough: Developing a Custom Application Using Excel Web Services](walkthrough-developing-a-custom-application-using-excel-web-services.md)
 
 
--  [Frequently Asked Questions About Excel Services UDFs](frequently-asked-questions-about-excel-services-udfs.md)
+-  [Frequently Asked Questions About Excel Services UDFs](frequently-asked-questions-about-excel-services-udfs.yml)
 
 
 -  [Unsupported Features in Excel Services](https://msdn.microsoft.com/library/5868e672-4786-4fed-9168-07ff538f6f5c%28Office.15%29.aspx)

docs/general-development/excel-services-user-defined-functions.md

@@ -1,5 +1,6 @@
 ---
 title: Excel Services User-Defined Functions
+description: "This section contains information about user-defined functions (UDFs) and how to use UDF attributes in your code."
 ms.date: 09/25/2017
 keywords: functions
 f1_keywords:
@@ -35,7 +36,7 @@ This section contains information about user-defined functions (UDFs) and how to
 > Get step-by-step instructions about developing Excel Services UDFs by using Microsoft Visual C#.
     
 
- [Frequently Asked Questions About Excel Services UDFs](frequently-asked-questions-about-excel-services-udfs.md)
+ [Frequently Asked Questions About Excel Services UDFs](frequently-asked-questions-about-excel-services-udfs.yml)