What does NTSTATUS 0x400A0004 (STATUS_CTX_CDM_CONNECT) mean?

 
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RPC_NT_SEND_INCOMPLETE STATUS_CTX_CDM_DISCONNECT

STATUS_CTX_CDM_CONNECT

A redirected client drive channel connected

This informational status belongs to the Terminal Services / Remote Desktop Services path. Client Drive Mapping is implemented through RDP device redirection rather than by mounting a normal local disk on the server.

The useful diagnostic question is whether the RDPDR/RDPEFS virtual channel negotiated successfully and whether policy allows the redirected drive class. Treat it as a session redirection event, not as evidence that the server gained direct block-device access to the client disk.

What to inspect

  • Check the RDP client redirection settings and server Group Policy for drive redirection.
  • Confirm that the RDPDR static virtual channel is present in the connection.
  • Correlate the event with logon timing and with any application that opens files from redirected drives.

References


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