An error occurred whilst trying to load some required components, Please ensure the following prerequisite components are installed. Microsoft Web Developer Tools Microsoft Exchange Web Services”

Visual Studio 2012 provides a great environment for dev/test SharePoint 2013 Apps.
This is true both for scenarios where you want to dev/test in the cloud and then run the app in the cloud, as well as for scenarios where you want to dev/test in the cloud and then run the app using an existing on-premises environment.
If you want to create a SharePoint 2013 app and your receive the following exception, follow the next step by step guide to resolve this issue.

1. Close the messagebox and Visual Studio.
2. Type appwiz.cpl in Run, this will open the Add/Remove Programs control window.
3. Uninstall Microsoft Exchange Web Services Managed API 2.0
4. Right click the EwsManagedApi32.msi link and use the Save link as option to store the msi in c:\downloads
5. Navigate to c:\downloads and type cmd in the adres bar (this will open the command prompt with c:\downloads as location)

1. Type dir and make sure EwsManagedApi32.msi is listed in the console window
2. Type EwsManagedApi32.msi addlocal=”ExchangeWebServicesApi_Feature,ExchangeWebServicesApi_Gac”
3. complete the installation procedure
4. Open Visual Studio 2012 and start a new SharePoint 2013 App project.

Ref :


http://blogs.msdn.com/b/timquin/archive/2013/01/22/setting-up-visual-studio-2012-for-sharepoint-2013-development-offline.aspx




 http://leonzandman.com/2013/02/07/prerequisite-components-error-when-creating-a-visual-studio-2012-sharepoint-2013-app-project/




http://tomvangaever.be/blogv2/2013/06/an-error-occurred-whilst-trying-to-load-some-required-components-please-ensure-the-following-prerequisite-components-are-installed-microsoft-web-developer-tools-microsoft-exchange-web-services/