Dynamics 365 CE on-premise 9.1.x Errors

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Posted on by khalifen

We are getting the following errors in Dynamics 365 CE on-premise 9.1.x

</StackTrace><ExceptionString>System.InvalidOperationException: The client certificate is not provided. Specify a client certificate in ClientCredentials. </ExceptionString></Exception></TraceRecord>

</StackTrace><ExceptionString>System.ServiceModel.Security.SecurityNegotiationException: A call to SSPI failed, see inner exception. ---&gt; System.Security.Authentication.AuthenticationException: A call to SSPI failed, see inner exception. ---&gt; System.ComponentModel.Win32Exception: The target principal name is incorrect

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Ramesh Kumar 7,511 Super User 2025 Season 2 on at

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Dynamics 365 CE on-premise 9.1.x Errors

These errors in Dynamics 365 CE On-Premises 9.1.x indicate issues related to SSL/TLS authentication between client and server — typically when using WS-Trust or WCF endpoints (e.g., for plugins, custom integrations, or service calls)

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Ramesh

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