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RPC_NT_STRING_TOO_LONG
The RPC string value is longer than the runtime accepts
This status is raised before the string can be safely used by the runtime. It can apply to binding strings, endpoints, principal names, entry names, or data strings marshalled through an RPC interface.
Identify which string is too long. A name-service entry, server principal name, endpoint string and application parameter have different limits and different fixes.
What to inspect
- Capture the exact string field and length.
- Check for accidental concatenation, unbounded user input, or wrong character width.
- Do not truncate security principal names silently; that can change authentication semantics.
References
- Microsoft: RpcBindingSetAuthInfoEx
- Microsoft: RPC name service entry overview
- Microsoft: Specifying RPC endpoints
- Microsoft Open Specifications: NTSTATUS values
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