What does HRESULT 0x8031004C (FVE_E_TOKEN_NOT_IMPERSONATED) mean?

Status / error code:

Category:

Constant name:

Source:

Facility:

Operating System:

Description:

The access token associated with the current thread is not an impersonated token.

Previous	Next
FVE_E_FS_MOUNTED	FVE_E_DRY_RUN_FAILED

FVE_E_TOKEN_NOT_IMPERSONATED

The failed prerequisite

FVE_E_TOKEN_NOT_IMPERSONATED / 0x8031004C marks a rejected BitLocker transition: the caller invoked a BitLocker operation that requires an impersonation token, but the thread is using a primary or non-impersonated token.

When policy is the boundary, retrying under SYSTEM does not necessarily help: policy can forbid the operation for every caller. Separate authorization from allow/require/disallow settings before changing identities.

Diagnostic map

Layer	policy and authorization
Proof to collect	process and thread token types, impersonation level, service identity, COM/WMI hosting path and whether the call crosses a remote management boundary
Different condition	ordinary access denied from insufficient privileges; this code identifies token type and call context rather than only authorization level
First safe change	fix the caller to impersonate the intended client at a sufficient level and revert impersonation cleanly after the operation

BitLocker evaluates the target volume together with effective Group Policy or MDM policy, Windows edition, caller authorization and the requested protector or management method. A policy HRESULT therefore describes a rejected configuration decision, not evidence that encrypted sectors are damaged.

A focused verification sequence

Record process and thread token types, impersonation level, service identity, COM/WMI hosting path and whether the call crosses a remote management boundary.

manage-bde -status
gpresult /h bitlocker-policy.html

State checks specific to FVE_E_TOKEN_NOT_IMPERSONATED

Stage	How to interpret it
Before the call	Record the target identity and the pre-call policy and authorization state. The caller invoked a BitLocker operation that requires an impersonation token, but the thread is using a primary or non-impersonated token.
At failure	Preserve process and thread token types, impersonation level, service identity, COM/WMI hosting path and whether the call crosses a remote management boundary.
After correction	Fix the caller to impersonate the intended client at a sufficient level and revert impersonation cleanly after the operation.

Official references

Looking for a different code? Search another status or error code.