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Dynamics 365 Community / Forums / Small and medium business | Business Central, N... / Business central 20
Small and medium business | Business Central, N...
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Business central 20

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Posted on by luki1997 50

hello 

i have installed business central 19 on premise. when i set the credential type Windows it works fine, when i change the credential type to navuserpassword it says: There is a communication protocol mismatch between the client and the server business central. i want to have the navuserpassword credential type because i have multiple users that login to the webclient of BC 19. 

i had it before the credential type NAVUserPassword and everything was working fine, now its not 

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  • Suggested answer
    Inge M. Bruvik Profile Picture
    Inge M. Bruvik 1,111 Moderator on at

    Please make sure you have configured both the server and clients correctly for the authentication type according to this documentation:

    learn.microsoft.com/.../users-credential-types

  • Suggested answer
    YUN ZHU Profile Picture
    YUN ZHU 95,729 Super User 2025 Season 2 on at

    Hi, hope the following helps.

    https://forum.mibuso.com/discussion/56400/there-is-a-communication-protocol-mismatch

    https://archerpoint.com/login-error-communication-protocol-mismatch-between-client-and-server/

    Thanks.

    ZHU

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