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0x00002179

ERROR_DS_NO_BEHAVIOR_VERSION_IN_MIXEDDOMAIN

The forest functional level cannot be raised to the requested value since one or more domains are still in mixed domain mode. All domains in the forest must be in native mode, for you to raise the forest functional level.

win32decimal 8569

Matched as: the code as given (hex)

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Source: System Error Codes (8200-8999) - Win32 apps · CC BY 4.0 · wording unchanged, formatting adapted for this site · retrieved 2026-10-09