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The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. The remote certificate is invalid according to the validation procedure.

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Posted on by source258147

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Hi experts,

We have a third-party module purchase it from the partner and we don't have the source code.

It worked very well until yesterday now I get this error.

The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel. The remote certificate is invalid according to the validation procedure.

Thanks

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ergun sahin 8,826 Moderator on at

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Could the TLS version have changed? If there is such a change, you can ask the 3rd party and add the new TLS in the code.

System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls12;

The situation is more difficult if the problem is caused by the SSL certificate.
In environments where we are in control, the solution is quite simple. You will add it to Trusted Root Certification Authorities\Certificates.

https://ax.docentric.com/how-to-configure-a-safe-connection-to-a-d365fo-in-a-local-development-environment/

It is also necessary to look at how it is added in the cloud environment. (If the certificate has an end date you can try your luck with rotate secrets but I'm not sure which certificates this feature affects) blog.johanpersson.nu/

As a workaround you can use "ServerCertificateValidationCallback" but in that case it will trust everything.

stackoverflow.com/.../could-not-establish-trust-relationship-for-the-ssl-tls-secure-channel-the-remot

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WillWU 22,361 on at

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Hi source258147,

If it's a cloud hosted system, please login to LCS, on the environment details and go to Maintain - Rotate secrets - Rotate SSL certificates.

If it doesn't work , you have to contact the partner for help.

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source258147 1,025 on at

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hi Will Wu

Can't find Rotate secrets

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source258147 1,025 on at

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can I get more help, please

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Sheikh Sohail 6,125 on at

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Please contact the person who allocate the VM or cloud environment

cloudblogs.microsoft.com/.../

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source258147 1,025 on at

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Hi Sohail Sheikh,

Thanks for your reply

this issue happens also in my local dev machine 10.0.20

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Sheikh Sohail 6,125 on at

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Hope it will help you.

ax.docentric.com/.../

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Sheikh Sohail 6,125 on at

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docs.microsoft.com/.../certificate-rotation-on-prem

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