KB3088041 - FIX: 401 error occurs when you try to connect to an MDS solution by using MDS Add-in for Excel

Applies To
SQL Server 2014 Enterprise - duplicate (do not use) SQL Server 2014 Developer - duplicate (do not use) SQL Server 2014 Standard - duplicate (do not use) SQL Server 2014 Web - duplicate (do not use)

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:

Note

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

Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. We recommend that you download and install the latest cumulative updates for SQL Server:

      

Status

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