RDP session fails for “Unknown extended disconnection reason 4399”

rdpremote desktopremote-access

I am trying to log into a jumphost using Remote Desktop Connection Manager v2.7. Normally I have no issue. Today I got this error code:

Disconnected from xxx.xxx.xxx-xxx.edu
[Unknown extended disconnection reason 4399]

a search revealed this Microsoft article which lists reason codes for this very scenario, unfortunatley, (at the time of this writing) the list jumps from reason code 4339 to reason code 4498.

I suspect that my session got hung up somehow as I disconnected last time, as opposed to logging out.

Thanks for any ideas.

Best Answer

I had the same issue today. I had a very old disconnected session still on the host. I logged the session out remotely with RDC Manager, and I was then able to start a new RDP session.

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