How do we go about disabling basic authentication in Exchange Online

Sarji Lorenz Salazar 20

https://learn.microsoft.com/en-us/exchange/clients-and-mobile-in-exchange-online/disable-basic-authentication-in-exchange-online

Aholic Liang-MSFT 13,861 Reputation points Microsoft Vendor

2023-02-21T06:14:46.97+00:00

Hi @Sarji Lorenz Salazar ，

Just checking in to see how things are going on with this thread.

If the reply was helpful, you can click the "Accept Answer" button under this post so that other's with similar question can benefit from this thread as well.

If you still have further questions or concerns, feel free to post back.
Aholic Liang-MSFT 13,861 Reputation points Microsoft Vendor

2023-02-28T05:08:32.29+00:00

Hi @Sarji Lorenz Salazar ，

Does this issue have any updates?

If it has been resolved, please click "Accept as answer" to mark useful post or share your solution, your action would benefit others who have similar issues.

If you have any questions or need further assistance, please feel free to post back. Thanks!

Accepted answer

Aholic Liang-MSFT 13,861 Reputation points Microsoft Vendor

2023-02-17T07:37:08.93+00:00

Hi @Sarji Lorenz Salazar ，

Just wondering where did you find out that your organization is suffering from a password attack? Maybe you can share the screenshot after removing all privacy information like domain name and email addresses.

In addition, since October2022, Exchange Online has been deprecating Basic Authentication. Therefore, this brute force attack or password spray attack should not be the same as the information in the link you provide.

About Azure AD accounts being locked out，You can refer to this document to manage smart lock values：

Prevent attacks using smart lockout - Azure Active Directory - Microsoft Entra | Microsoft Learn

Hope this helps!

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