SBOM Signing Submission failing due to ESRP Outage

[Winniexu01]

Failing build (internal Microsoft link)

The Generate SBoM Manifest build step failed to sign SBOM files.

Detected SPDX 2.2 sbom in the path. Submitting for signing...
##[warning]Error: Request timeout: /dnceng/internal/_apis/SBOM/DigestSigning
##[warning]Error: Request timeout: /dnceng/internal/_apis/SBOM/DigestSigning
(node:140802) [DEP0005] DeprecationWarning: Buffer() is deprecated due to security and usability issues. Please use the Buffer.alloc(), Buffer.allocUnsafe(), or Buffer.from() methods instead.
(Use node --trace-deprecation ... to show where the warning was created)
##[error]Encountered failure while submitting SBOM files for signing. This is likely due to a ESRP outage. ErrorInfo: ESRPClient.exe failed with error: 2025-08-12T08:54:13.1706629Z:Error: System.OperationCanceledException: The operation was canceled.
at System.Threading.Tasks.Parallel.ForWorker[TLocal](Int32 fromInclusive, Int32 toExclusive, ParallelOptions parallelOptions, Action1 body, Action2 bodyWithState, Func4 bodyWithLocal, Func1 localInit, Action1 localFinally) at System.Threading.Tasks.Parallel.ForEachWorker[TSource,TLocal](IEnumerable1 source, ParallelOptions parallelOptions, Action1 body, Action2 bodyWithState, Action3 bodyWithStateAndIndex, Func4 bodyWithStateAndLocal, Func5 bodyWithEverything, Func1 localInit, Action1 localFinally) at System.Threading.Tasks.Parallel.ForEach[TSource](IEnumerable1 source, ParallelOptions parallelOptions, Action`1 body)
at MS.Ess.EsrpClient.Sign.SignHandlers.SignJobHandler.d__23.MoveNext()

[MichaelSimons]

This issue is was resolved. SBOM signing steps are now passing.