Authentication failed – Cannot Get SID

Forum / NoMachine for Windows / Authentication failed – Cannot Get SID

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  • #10143

    Just installed NoMachine5 (free) on two Windows hosts. Server is Win7, client is Win10. When I try to connect to the server I get an authentication failure. Server logs show:

    Cannot get user sid for <username>
    Error is: 2, ‘No such file or directory’
    NXLogin: Cannot retrieve SID for login: <username>

    And that just repeats several times on each connection attempt. Neither machine is joined to a domain. Yes, I rebooted after install. This seems really basic but I’m having zero luck with google on the error message. Any ideas?


    This looks similar to a problem that we recently investigated. Can you send us the complete set of logs and send to forum[at]nomachine[dot]com?

    Follow the instructions here: We’ll need both sides, local (client) and remote (server).

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