When you try to activate or sign in to any of the Microsoft Office 2016 applications after you install the version 15.33 update, you receive a blank authentication screen.
Additionally, you may see any of the following symptoms:
The following issues occur in the Unified Logging Service (ULS) log:
- The server has redirected to a non-https URL.
- Errors exist in the Azure Active Directory Authentication Library (ADAL) authentication.
To locate the ULS log, open Finder and browse to the following path:
Note <Application> represents the name of the application that you are troubleshooting.
You notice that in an HTTP trace, the server response includes multiple WWW-Authenticate headers, such as the following:
The symptoms occurs for the following corresponding reasons:
Starting from Office 2016 for Mac version 15.33, unsecured endpoint traffic is blocked in authentication flows.
Starting from Office 2016 for Mac version 15.33, the authentication method no longer selects NTLM authentication when multiple WWW-Authenticate headers are present in the response. The issue occurs when the selected authentication method is unsuccessful.
Configure all authentication endpoints to use Secure Sockets Layer (SSL) protocol.
Make sure that only one valid authentication method is included in the authentication challenge response.
More information 1
This resolution applies when you use Microsoft Active Directory Federation Services and non-Microsoft federation solutions.
More information 2
Microsoft is researching this problem, and will post more information in this article when the information becomes available.
Article ID: 4034397 - Last Review: 2017, ജൂലൈ 6 - Revision: 6