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Small and medium business | Business Central, N...

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"Communication protocol mismatch" Error.

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Hi Experts,

I followed this Blog to change the credential type to NavUserPassword

https://www.sauravdhyani.com/2020/07/msdyn365bc-modern-client-with.html?lr=1

but after completing all the steps mentioned, I'm getting the following error in web client. Please help me to resolve the issue. 0741.error.png

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DAnny3211 11,417 Super User 2026 Season 1 on at

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hello

look in the folder search %AppData% (this is for Dynamics NAV 18 , but it is the same for BC on-prem)

open CLientusersettings.config

and change the following parameter as on the service:

AS iS:

<add key="ClientServicesCredentialType" value="Windows" />

TO be:

<add key="ClientServicesCredentialType" value="NavUserPassword" />

check my answer if it helped you, thanks

DANIELE

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Dynamics Business C... 50 on at

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hello Daniele ,

thanks for early replay, I got to know for Navision but I'm asking for Business central on-Prem, so can I know where the ClientUserSettings.config file is present for BC

I have changed in the ClientServicesCredentialType to NavUserPassword whiich is there in "C:\inetpub\wwwroot\<ServerInstance>\navsettings.json".

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Amit 2,563 on at

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Hi,

Refer the below link

https://erpconsultors.com/business-central-d365-installation/

Regards

Amit Sharma

www.erpconsultors.com

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RahulBansode 171 on at

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Could be a caching issue, try it in incognito mode.

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CLOUDEAGLE 12 on at

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Have you found the solution ?

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