ProtocolBound

Error code lookup

Look up Windows, Entra sign-in, Intune and mail delivery codes.

How to use it

  1. Paste the error code exactly as shown, such as AADSTS50126 or 0x80070005.
  2. Read what it means and the usual fix.
  3. Not found? Try the code without the 0x or extra text around it.

Error codes

  • 0x80070005 E_ACCESSDENIED (Windows): Access is denied.
  • 0x80070002 ERROR_FILE_NOT_FOUND (Windows): The system cannot find the file specified.
  • 0x80070003 ERROR_PATH_NOT_FOUND (Windows): The system cannot find the path specified.
  • 0x80070057 E_INVALIDARG (Windows): The parameter is incorrect.
  • 0x8007000E E_OUTOFMEMORY (Windows): Not enough memory resources to complete the operation.
  • 0x80004005 E_FAIL (Windows): Unspecified error.
  • 0x80072EE2 ERROR_INTERNET_TIMEOUT (Windows): The connection to the server timed out.
  • 0x80072EFD ERROR_INTERNET_CANNOT_CONNECT (Windows): A connection with the server could not be established.
  • 0x8024402C WU_E_PT_WINHTTP_NAME_NOT_RESOLVED (Windows Update): Windows Update could not resolve the server name.
  • 0x800F081F CBS_E_SOURCE_MISSING (Windows Update): Source files for the feature or repair could not be found.
  • 0x80073712 ERROR_SXS_COMPONENT_STORE_CORRUPT (Windows Update): The component store is corrupted.
  • 0x800F0922 CBS_E_INSTALLERS_FAILED (Windows Update): An update failed to install.
  • 0x80070643 ERROR_INSTALL_FAILURE (Windows Update): Fatal error during installation.
  • 0xC1900101 Driver rollback (Windows Update): A driver caused the feature upgrade to roll back.
  • 0x0000007B INACCESSIBLE_BOOT_DEVICE (Stop code): Windows lost access to the boot drive during startup.
  • 0x000000EF CRITICAL_PROCESS_DIED (Stop code): A critical system process stopped unexpectedly.
  • 0x0000009F DRIVER_POWER_STATE_FAILURE (Stop code): A driver did not handle a sleep or power transition.
  • 0x00000133 DPC_WATCHDOG_VIOLATION (Stop code): A driver ran too long at high priority.
  • 0x0000001A MEMORY_MANAGEMENT (Stop code): A severe memory management error occurred.
  • 0x00000050 PAGE_FAULT_IN_NONPAGED_AREA (Stop code): Invalid system memory was referenced.
  • AADSTS50126 Invalid credentials (Entra sign-in): Invalid username or password.
  • AADSTS50076 MFA required (Entra sign-in): Multi-factor authentication is required to access this resource.
  • AADSTS50053 Account locked (Entra sign-in): The account is locked, usually by smart lockout after repeated bad sign-ins.
  • AADSTS50057 Account disabled (Entra sign-in): The user account is disabled.
  • AADSTS50105 Not assigned (Entra sign-in): The user is not assigned to a role or group for this application.
  • AADSTS53003 Blocked by Conditional Access (Entra sign-in): Access was blocked by a Conditional Access policy.
  • AADSTS53000 Device not compliant (Entra sign-in): Conditional Access requires a compliant or managed device.
  • AADSTS700016 App not found (Entra sign-in): The application was not found in the directory.
  • AADSTS65001 Consent required (Entra sign-in): The user or administrator has not consented to use the application.
  • AADSTS50020 User not in tenant (Entra sign-in): The account from the identity provider does not exist in the tenant.
  • 0x80180018 MENROLL_E_LICENSE (Intune): The user does not have a license that includes Intune.
  • 0x80180014 MENROLL_E_DEVICENOTSUPPORTED (Intune): Enrollment of this device or platform is not allowed.
  • 0x87D1041C App not detected (Intune): The app installed, but the detection rule did not find it.
  • 0x87D1FDE8 Remediation failed (Intune): A setting failed to apply on the device.
  • 550 5.1.1 Recipient not found (Mail delivery): The recipient address does not exist at the destination.
  • 550 5.1.10 Recipient not found (Exchange Online) (Mail delivery): The recipient was not found by Exchange Online.
  • 550 5.7.1 Delivery not authorized (Mail delivery): The sender is not allowed to send to this recipient or group.
  • 554 5.2.2 Mailbox full (Mail delivery): The recipient mailbox is over its quota.
  • 550 5.4.1 Access denied (DBEB) (Mail delivery): Directory-based edge blocking rejected an unknown recipient.
  • 550 5.7.708 Traffic not accepted from this IP (Mail delivery): Microsoft blocked mail from the sending IP.