0x00000556
ERROR_LOGON_SESSION_COLLISION
The logon session ID is already in use.
win32decimal 1366Security and authentication
Matched as: the code as given (hex)
Log a case with no specific solution
Source: System Error Codes (1300-1699) - Win32 apps · CC-BY-4.0 (MicrosoftDocs/sdk-api, repo license verified 2026-10-09) · retrieved 2026-10-09