Could not establish trust relationship for SSL/TLS secure channel

Rajveer singh

Dear all,

I'm using a windows application and get data from the server through WEB API. the server configures with TLS 1.2 and also a client. The client installed more than 10 PCs (Windows 10) on the same network. 7-8 PCs working perfectly. And 2 systems getting this error (Could not establish trust relationship for SSL/TLS secure channel).

network as proxy and systems bind with the domain.

3 Replies

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Rajveer singh4y ago
System.Net.ServicePointManager.SecurityProtocol |= SecurityProtocolType.Tls12;
Already used
Muhammad Imran Ansari4y ago
The trust relationship between this workstation and the primary domain failed.
To resolve this issue for 2 PCs, remove the computer from the domain, and then connect the computer to the domain. Follow the steps to accomplish this:
https://support.microsoft.com/en-us/topic/-the-trust-relationship-between-this-workstation-and-the-primary-domain-failed-error-when-you-log-in-to-windows-7-48124cd3-bae2-2428-f362-bf8da683e59c
Guest User4y ago
What you can try is setting the TLS explicitly in code. It helped me when working on some older machines:
System.Net.ServicePointManager.SecurityProtocol |= SecurityProtocolType.Tls12;