0xC000015B | Logon type not granted

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Systems & Devices

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/systems/security-systems/error-codes/0xc000015b/

Last Updated

Feb 27, 2026

Summary

The account is not allowed to log on using the requested logon type (e.g., RDP, service, network).

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Guides

Security System Error Codes: Sensors, Panels, Battery, and Communication Issues

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What This Code Means

0xC000015B indicates a policy restriction that denies the requested logon type. For example, an account may be blocked from interactive logon, remote desktop logon, or “log on as a service” depending on local or domain policy.

Where Users Usually See This Code

RDP login failures
Service startup failures when the service account lacks “log on as a service”

Why This Code Appears

User rights assignment policy does not permit that logon type
Group policy changed
Account moved to different group/OU

What Typically Happens Next

Authentication fails until rights are granted appropriately

What This Code Is Not

It is not always a wrong password
It is not a network outage

Troubleshooting Checklist

□ Identify the logon type (service, RDP, network) being attempted
□ Review user rights assignment and group policy
□ Grant the minimal required rights following your security policy

Notes And Edge Cases

Over-granting logon rights is a security risk; apply least privilege.

Related Codes

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