[Access Control] How to Check Basic Authentication Access Logs

Overview

• This article explains how to check whether Basic Authentication (Legacy Authentication) is being used for Microsoft 365 (Azure Active Directory) using Access Control or Microsoft 365.

Notes

1. The Access Control information in this article is based on product specifications as of November 2026 and may be changed without prior notice.
2. The information in this article is based on Microsoft product specifications as of November 2026.
   It may be changed without prior notice due to future updates or specification changes.
3. Please use a Microsoft 365 Admin account to perform this procedure.

Table of Contents

• When Using Access Control
• When Using Microsoft 365

Procedure

When Using Access Control

1. From the Access Control Administration, go to ［Log Management］－［Access Logs］.

   

2. From the search bar in the upper-right corner of the screen, adjust the search period. Then, from ［Filters］, select ［Login Type］－［WS-Trust］ (this clears the checkbox for ［Hide Legacy Authentication logs］), and click ［Search］.

   

3. The search results are displayed.
   Note: Please also refer to the following articles related to Access Logs.
   [Access Control] Access Logs for SMTP Basic Authentication (Microsoft 365)
   I want to use HENNGE Access Control together with Microsoft Entra Join.

When Using Microsoft 365

When using Microsoft 365, please refer to the following article.
What are Microsoft Entra sign-in logs? (External Link)
※ For detailed procedures, please contact Microsoft.

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