Explanation of Entra ID Sign-In Failure (50199) Followed by Success

Summary

The observed sign-in failure (Error 50199) is not indicative of a security issue, authentication failure, or unauthorized access attempt. It is part of a normal Microsoft Entra ID authentication flow where an application initially attempts a silent token acquisition and Entra ID determines that user interaction is required before issuing an access token.

In this case, the authentication process completed successfully one second later using the same session and correlation ID.

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Timeline

Event 1

Timestamp: 28 September 2026 18:31:59

Status: Failure

Error Code: 50199

Reason:

For security reasons, user confirmation is required for this request. Please repeat the request allowing user interaction.

Additional Detail:

MFA requirement satisfied by strong authentication

Event 2

Timestamp: 28 September 2026 18:32:00

Status: Success

Additional Detail:

MFA requirement satisfied by claim in the token

Both events share the same:

• Correlation ID: 94abec50-3383-43e2-9776-42591548b01b
• Session ID: 008da1ea-1ca6-e9a2-9c6c-cb3012ef7a1b
• Application: HP Authentication Manager – Azure Only
• Resource: Microsoft Graph

This confirms both log entries belong to a single authentication transaction.

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Authentication Flow

The following sequence occurred:

User starts authentication in HP Authentication Manager

│
▼

Application attempts silent token acquisition
(no user interaction)

│
▼

Microsoft Entra ID determines that
user interaction is required

│
▼

Entra ID returns Error 50199

│
▼

Application initiates interactive authentication

│
▼

User confirmation/account selection completes

│
▼

MFA requirement validated

│
▼

Access token issued successfully

│
▼

Successful sign-in recorded

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Why Error 50199 Occurs

Error 50199 is commonly generated when Microsoft Entra ID requires an interactive authentication step and cannot complete the request silently.

Examples include:

• Account selection confirmation
• Session validation
• Conditional Access claim challenge
• Refresh token revalidation
• Security confirmation required before token issuance

The key point is that authentication itself did not fail.

The first request was simply unable to complete without user interaction.

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Evidence That Authentication Was Successful

The successful sign-in occurred:

• One second after the failure
• Within the same session
• Using the same correlation ID
• Against the same application and resource

Additionally:

Failure Event

MFA requirement satisfied by strong authentication

Success Event

MFA requirement satisfied by claim in the token

This indicates:

• Multifactor authentication requirements were met.
• Microsoft Entra ID accepted the authentication assurance level.
• A valid access token was ultimately issued to Microsoft Graph.

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Security Assessment

Security Impact

None

The event does not indicate:

• Credential compromise
• Password failure
• MFA bypass
• Conditional Access violation
• Unauthorized access
• Application misconfiguration

Risk Level

Low / Informational

This is considered a normal authentication pattern for modern applications using Microsoft identity platforms.

Action Required

No remediation required.

The event can be documented as an expected authentication flow where:

1. Silent token acquisition was attempted.
2. Interactive user confirmation became necessary.
3. Authentication completed successfully.
4. Access was granted.

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Recommended Audit Note

A Microsoft Entra ID Error 50199 was recorded for HP Authentication Manager during token acquisition. The failure occurred because Microsoft Entra ID required user interaction before issuing an access token. The authentication transaction immediately completed successfully one second later using the same session and correlation identifiers. MFA requirements were satisfied and a valid token was issued to Microsoft Graph. No security risk or remediation action has been identified. The event is considered normal authentication behaviour.