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How to Resolve Undocumented Office 365 API AuthenticationMethod Values

Maira Mehtab Sep 21, 2026 869 views

Question details

The user needs to understand the meaning of undocumented AuthenticationMethod values (such as 64, 262144, and 33554440) returned by the Office 365 Management Activity API.

Product: Office 365 Management Activity API
Device & OS: not provided
Scenario: Monitoring audit logs or developing integrations using the Office 365 Management Activity API.
Observed behavior: The API returns AuthenticationMethod values outside the officially documented 0 through 19 range, making their exact meanings unclear to tenant administrators.

Before you start

Gather your sample API responses, specific tenant context, and the relevant audit event types triggering these values before reaching out for developer support.

Solution 1Recommended

Escalate to Microsoft Q&A Specialists

Because this issue pertains to backend API schemas and undocumented enumerations, it requires specialized developer support from Microsoft rather than standard community forums.

The Office 365 API schema and architecture are complex and frequently updated. Standard community support channels typically do not have access to backend documentation for undocumented integer values like 64, 262144, or 33554440. You must consult Microsoft 365 API specialists.

Navigate to Microsoft Q&A

Go to the Microsoft Q&A platform or Microsoft Learn forums.

Select the Appropriate Tags

Use the 'Microsoft 365' tag or 'Office Development' category to ensure your question reaches the correct engineering and API specialist teams.

Draft Your Support Request

Create a new question detailing the issue. Include your exact API query format, sanitized sample JSON responses, and relevant details about your tenant environment.

Reference Official Documentation

Specify the official documentation version you are referencing, explicitly pointing out the discrepancy between your received values and the documented 0-19 range.

Developer Support: Posting in Microsoft Q&A directly connects you with Microsoft 365 API specialists who have internal resources to clarify unlisted enumeration values and bitwise flags.

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Frequently Asked Questions

What is the Office 365 Management Activity API?

It is a REST API that provides information about various user, admin, system, and policy actions and events from Office 365 and Azure Active Directory activity logs.

Why am I seeing AuthenticationMethod values not listed in the official documentation?

Microsoft frequently updates backend services. New authentication methods or internal combinations (often represented by bitwise flags or new integers like 33554440) might be deployed to tenants before the public developer documentation is fully updated.

Can standard Microsoft Support resolve API schema questions?

Typically, frontline consumer support cannot. Questions concerning API schemas, architecture, and developer-level issues should be directed to Microsoft Q&A or Microsoft Learn forums where dedicated API specialists operate.

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