Office 2016 Mac Skip Sign In

Collaborate for free with online versions of Microsoft Word, PowerPoint, Excel, and OneNote. Save documents, spreadsheets, and presentations online, in OneDrive. Microsoft Office 2016 Standard free download - Microsoft Office 2016 Preview, Microsoft Office Project Standard 2007, Microsoft Office 2016, and many more programs.

-->

Note

Office 365 ProPlus is being renamed to Microsoft 365 Apps for enterprise. For more information about this change, read this blog post.

Symptoms

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.

Symptom 1

The following issues occur in the Unified Logging Service (ULS) log:

The server has redirected to a non-https URL.
Errors occur in Azure Active Directory Authentication Library (ADAL) authentication.

To locate the ULS log, open Finder and browse to the following path:

~/Library/Containers/com.microsoft.<Application>/Data/Library/Caches/Microsoft/uls/com.microsoft.<Application>/logs

Note <Application> represents the name of the application that you are troubleshooting.

Symptom 2

You notice that in an HTTP trace, the server response includes multiple WWW-Authenticate headers, such as the following:

WWW-Authenticate: Negotiate

WWW-Authenticate: NTLM

Cause

The symptoms occur for the following corresponding reasons:

Cause for symptom 1

Starting from Office 2016 for Mac version 15.33, unsecured endpoint traffic is blocked in authentication flows.

Cause for symptom 2

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.