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| FVE_E_NOT_ALLOWED_IN_VERSION | FVE_E_MOR_FAILED |
FVE_E_NO_AUTOUNLOCK_MASTER_KEY
FVE_E_NO_AUTOUNLOCK_MASTER_KEY means that BitLocker could not obtain the auto-unlock master key from the operating-system volume. Auto-unlock depends on key material stored and protected by the OS drive; it is not portable to every recovery or data-drive state.
How to investigate
- Confirm that the operating-system volume is available, protected as expected, and not in a recovery or unsupported state.
- Check whether the selected drive is eligible for auto-unlock on this computer.
- Keep an independent recovery method for the data volume rather than relying only on auto-unlock.
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