You are prompted for credentials when you use a Windows Phone device to connect to a SharePoint site that is enabled for anonymous access
This article describes an issue occurs in Microsoft SharePoint Server 2013.
When you enable anonymous access for a SharePoint site in Microsoft SharePoint Server 2013 and then try to open the site from a Windows Phone device, you are prompted for credentials.
To enable the Windows Phone device to access the SharePoint site, the SharePoint application that hosts the site must use Negotiate authentication and must disable anonymous access.
Article ID: 2769365 - Last Review: 11/01/2012 03:17:00 - Revision: 1.0
Microsoft SharePoint Server 2013
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