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ERROR_EFS_DISABLED
EFS is disabled at the computer-policy level
The EFS Group Policy extension defines an enabled-status setting whose disabled value prevents EFS use on the client. This differs from a directory disabled with EncryptionDisable and from a file system that lacks FILE_SUPPORTS_ENCRYPTION.
Determine the effective policy source before changing registry data locally. A domain GPO can reapply the setting, and disabling EFS may be an intentional data-protection decision. Applications should not fall back to unencrypted output without an explicit policy decision.
What to inspect
- The effective EFS enabled-status policy and the GPO that supplied it.
- Group Policy processing logs and the resulting machine policy state.
- Whether only one directory is blocked or EFS is disabled system-wide.
- The application's behavior when encryption is mandatory but unavailable.
References
- Microsoft Open Specifications: EFS Enabled Status
- Microsoft Open Specifications: EFS Group Policy overview
- Microsoft: File Encryption
- Microsoft Open Specifications: Win32 error codes
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