FIX: 401 error occurs when you try to connect to an MDS solution by using MDS Add-in for Excel

Symptoms

Assume that you have a Master Data Services (MDS) solution in Microsoft SQL Server 2014 and the solution uses the NT LAN Manager (NTLM) Authentication protocol. When you try to connect to the MDS solution by using MDS Add-in for Excel, you receive the following error message:
The HTTP request is unauthorized with client authentication scheme ‘Negotiate’….401 error

Resolution

The issue was first fixed in the following cumulative update of SQL Server:
Recommendation: Install the latest cumulative update for SQL Server

Status

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.

Properties

Article ID: 3088041 - Last Review: Aug 24, 2015 - Revision: 1

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