TechShizz | Unable to activate Office 365 - Activation window blank when trying to activate

Unable to activate Office 365 - Activation window blank when trying to activate

Problem

Various authentication issues including:

  • Outlook wont authenticate on Office 365
  • Activation window blank when trying to activate Office 365
  • Outlook wont authenticate on Office 365 with SSO
Cause

ADAL is the new authentication method for azure cloud solutions. It over-rides the standard kerberos, basic and NTLM protocols - There seems to be an issue with this displaying (usually windows 10).

Solution

ADAL can be disabled by registry key:

To disable modern authentication on a device, set the following registry keys:

Run > Regedit > 

Registry key

    Type

       Value

HKCU\SOFTWARE\Microsoft\Office\16.0\Common\Identity\EnableADAL

    REG_DWORD

        0


Reference, Links and Imges

https://answers.microsoft.com/en-us/msoffice/forum/msoffice_outlook/modern-authentication-on-outlook-2016-keeps-on/98a263f4-ab9c-4d6f-b5eb-2728a8e77412 

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