Sign in to the Office 365 portal. Click Settings , and then click Office 365 settings. Locate the Assigned licenses area. If you see The latest desktop version of Office, then you have an Office subscription assigned correctly. 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.
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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./Data/Library/Caches/Microsoft/uls/com.microsoft./logs
Note Best free app for photo editing for mac. 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.
Resolution
Resolution for symptom 1
To locate the ULS log, open Finder and browse to the following path:
~/Library/Containers/com.microsoft./Data/Library/Caches/Microsoft/uls/com.microsoft./logs
Note Best free app for photo editing for mac. 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.
Resolution
Resolution for symptom 1
Configure all authentication endpoints to use the Secure Sockets Layer (SSL) protocol.
Resolution for symptom 2
Install the September 2017 update for Office 2016 for Mac version 15.38.
More Information
Can 27t Sign In To Activate Office For Mac Download
More information for symptom 1
Can%27t Sign In To Activate Office For Macbook
The resolution applies when you use Microsoft Active Directory Federation Services or non-Microsoft federation solutions.
