How to enable modern authentication for Office 2013

Recently, Microsoft has removed the basic authentication for all its Microsoft 365 services. Basic authentication is turned off for Exchange Online mailboxes on Microsoft 365 which means that if Outlook 2013 is not configured to use modern authentication, it loses the ability to connect.

To enable modern authentication for Office 2013, a Windows Registry setting must be implemented. This can be achieved manually by adding the following key:

The EnableADAL registry key referenced earlier must be created (Reg_DWORD) and set to 1:

HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Common\Identity\EnableADAL = 1

A quicker way is by adding these code into a notepad, and save the file with the file extension .reg instead of .txt   :

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Exchange]
“AlwaysUseMSOAuthForAutoDiscover”=dword:00000001

[HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Common]

[HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Common\Identity]
“EnableADAL”=dword:00000001
“Version”=dword:00000001

Alternatively, you can download it here – https://sotonproduction.service-now.com/sys_attachment.do?sys_id=7f85cd17dbbec4d4bc72b29f299619f3

For more info on this, you can find out more at https://learn.microsoft.com/en-us/microsoft-365/admin/security-and-compliance/enable-modern-authentication?view=o365-worldwide 

Another one is here – https://knowledgenow.soton.ac.uk/Articles/KB0059904

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