Merge pull request #569 from MicrosoftDocs/ghogen-coauth

Add coauthoring doc from Excel team

Author: ghogen

docs/vsto/TOC.md

@@ -145,6 +145,7 @@
 ###### [How to: Map Schemas to Word Documents Inside Visual Studio](how-to-map-schemas-to-word-documents-inside-visual-studio.md)
 ###### [How to: Map Schemas to Worksheets Inside Visual Studio](how-to-map-schemas-to-worksheets-inside-visual-studio.md)
 ##### [Using Local Database Files in Office Solutions Overview](using-local-database-files-in-office-solutions-overview.md)
+#### [How AutoSave Impacts Office Solutions](how-autosave-impacts-office-solutions.md)
 #### [Troubleshooting Office Solutions](troubleshooting-office-solutions.md)
 ##### [Troubleshooting Errors in Office Solutions](troubleshooting-errors-in-office-solutions.md)
 ##### [How to: Re-enable a VSTO Add-in That Has Been Disabled](how-to-re-enable-a-vsto-add-in-that-has-been-disabled.md)
@@ -208,6 +209,7 @@
 ##### [How to: Map ListObject Columns to Data](how-to-map-listobject-columns-to-data.md)
 ##### [How to: Fill ListObject Controls with Data](how-to-fill-listobject-controls-with-data.md)
 ##### [Walkthrough: Programming Against Events of a NamedRange Control](walkthrough-programming-against-events-of-a-namedrange-control.md)
+#### [Understanding Coauthoring and Add-Ins](understanding-coauthoring-and-addins.md)
 #### [Globalization and Localization of Excel Solutions](globalization-and-localization-of-excel-solutions.md)
 #### [Using Windows Forms Controls on Excel Worksheets](using-windows-forms-controls-on-excel-worksheets.md)
 #### [Walkthrough: Creating Your First Document-Level Customization for Excel](walkthrough-creating-your-first-document-level-customization-for-excel.md)

docs/vsto/developing-office-solutions.md

@@ -55,6 +55,7 @@ manager: "ghogen"
 |[Programming Document-Level Customizations](../vsto/programming-document-level-customizations.md)|Provides an overview of the programming model of document-level customizations and related programming tasks.|  
 |[Office UI Customization](../vsto/office-ui-customization.md)|Describes the different ways that you can customize the UI of Office applications by using VSTO Add-ins and document-level customizations.|  
 |[Data in Office Solutions](../vsto/data-in-office-solutions.md)|Describes the different ways that you can work with data in Office solutions, such as binding data to controls and caching data in document-level customizations.|  
+|[How AutoSave Impacts Office Solutions](./how-autosave-impacts-office-solutions.md)|Describes adjustments you might need to make to Office Solutions when AutoSave is enabled.|
 |[Troubleshooting Office Solutions](../vsto/troubleshooting-office-solutions.md)|Provides tips for solving common problems that you might encounter when creating Office solutions.|  
 |[Threading Support in Office](../vsto/threading-support-in-office.md)|Provides an overview of working with multiple threads in Office solutions.|  
 |[Accessibility in Office Projects](../vsto/accessibility-in-office-projects.md)|Describes the accessibility features that are available in Office solutions.|  

docs/vsto/excel-solutions.md

@@ -119,7 +119,8 @@ manager: "ghogen"
 |[Windows Forms Controls on Office Documents Overview](../vsto/windows-forms-controls-on-office-documents-overview.md)|Describes how you can add Windows Forms controls to Excel worksheets.|  
 |[Walkthrough: Creating Your First Document-Level Customization for Excel](../vsto/walkthrough-creating-your-first-document-level-customization-for-excel.md)|Demonstrates how to create a basic document-level customization for Excel.|  
 |[Walkthrough: Creating Your First VSTO Add-in for Excel](../vsto/walkthrough-creating-your-first-vsto-add-in-for-excel.md)|Demonstrates how to create a basic VSTO Add-in for Excel.|  
-|[Walkthrough: Adding Controls to a Worksheet at Run Time in VSTO add-in Project](../vsto/walkthrough-adding-controls-to-a-worksheet-at-run-time-in-vsto-add-in-project.md)|Demonstrates how to add a Windows Forms button, a <xref:Microsoft.Office.Tools.Excel.NamedRange>, and a <xref:Microsoft.Office.Tools.Excel.ListObject> to a worksheet at run time by using a VSTO Add-in.|  
+|[Walkthrough: Adding Controls to a Worksheet at Run Time in VSTO add-in Project](../vsto/walkthrough-adding-controls-to-a-worksheet-at-run-time-in-vsto-add-in-project.md)|Demonstrates how to add a Windows Forms button, a <xref:Microsoft.Office.Tools.Excel.NamedRange>, and a <xref:Microsoft.Office.Tools.Excel.ListObject> to a worksheet at run time by using a VSTO Add-in.|
+|[Understanding Coauthoring and Add-Ins](./understanding-coauthoring-and-addins.md)|Describes adjustments you might need to make to your solutions to accommodate coauthoring.|  
 |[Excel 2010 in Office Development](http://go.microsoft.com/fwlink/?LinkId=199011)|Provides links to articles and reference documentation about developing Excel solutions. These are not specific to Office development using Visual Studio.|  
 
 

docs/vsto/how-autosave-impacts-office-solutions.md

@@ -0,0 +1,29 @@
+---
+title: "How AutoSave Impacts Office Solutions | Microsoft Docs"
+ms.custom: ""
+ms.date: "07/20/2017"
+ms.prod: "visual-studio-dev15"
+ms.reviewer: ""
+ms.suite: ""
+ms.technology: 
+  - "office-development"
+ms.tgt_pltfrm: ""
+ms.topic: "article"
+dev_langs: 
+  - "VB"
+  - "CSharp"
+helpviewer_keywords: 
+  - "autosave"
+ms.assetid: b60bb228-0e72-4f24-88bb-397dfc5d50a7
+author: "ghogen"
+ms.author: "ghogen"
+manager: "ghogen"
+---
+# How AutoSave Impacts Office Solutions
+
+AutoSave is a feature for Excel, PowerPoint and Word that, when turned on, enables the user’s edits to be saved automatically and continuously. If AutoSave is turned off, then save must be triggered manually for the user's changes to be persisted. With the addition of this feature, you may need to make adjustments to your Office solution in order to ensure that it works smoothly even while AutoSave is on. For details, see [How AutoSave impacts add-ins and macros](https://msdn.microsoft.com/vba/office-shared-vba/articles/how-autosave-impacts-addins-and-macros). For more information about AutoSave in general, see [What is AutoSave?](https://support.office.com/en-US/article/What-is-AutoSave-6d6bd723-ebfd-4e40-b5f6-ae6e8088f7a5).
+
+Note: AutoSave for Windows Desktop Word, Excel and PowerPoint was introduced in 2017 and is currently available for Office365 subscribers. Users who purchased a perpetual license to Office 2016 or earlier do not currently have access to the coauthoring feature. (Excel Online, Excel for Android, Excel for iOS, and Excel Mobile in the Windows Store also support AutoSave). 
+
+## See Also
+[Developing Office Solutions](./developing-office-solutions.md)

docs/vsto/understanding-coauthoring-and-addins.md

@@ -0,0 +1,29 @@
+---
+title: "Understanding Coauthoring and Add-Ins | Microsoft Docs"
+ms.custom: ""
+ms.date: "07/20/2017"
+ms.prod: "visual-studio-dev15"
+ms.reviewer: ""
+ms.suite: ""
+ms.technology: 
+  - "office-development"
+ms.tgt_pltfrm: ""
+ms.topic: "article"
+dev_langs: 
+  - "VB"
+  - "CSharp"
+helpviewer_keywords: 
+  - "coauthoring, in Excel"
+ms.assetid: a9479a52-54e5-421c-9a89-69607153bf6b
+author: "ghogen"
+ms.author: "ghogen"
+manager: "ghogen"
+---
+# Understanding Coauthoring and Add-Ins
+
+Coauthoring is a feature of Excel for Windows desktop that allows you to edit a workbook hosted in the cloud (that is, OneDrive, OneDrive for Business, or SharePoint Online) simultaneously with other users. With the addition of this feature, you may need to make adjustments to your Excel Solution in order to ensure that it works smoothly even while users are coauthoring. See [About Coauthoring in Excel](https://msdn.microsoft.com/vba/excel-vba/articles/about-coauthoring-in-excel).
+
+Note: Coauthoring for Windows Desktop Excel was introduced in 2017 and is currently available for Office365 subscribers. Users who purchased a perpetual license to Office 2016 or earlier do not currently have access to the coauthoring feature. (Excel Online, Excel for Android, Excel for iOS, and Excel Mobile in the Windows Store also support coauthoring).
+
+## See Also
+[Excel Solutions](./excel-solutions.md)