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Client computers not connecting after server certificate change

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Couple of days ago, we changed our ESET Protect On-Prem server certificate, as it was about to expire, and the old certificate was revoked. Today we see that several computers, which were offline when we replaced the certificate, are not connecting to the server. We saw in the logs in "C:\ProgramData\ESET\RemoteAdministrator\Agent\EraAgentApplicationData\Logs" an error message "Error: Remote server peer certificate is not trusted by this agent. Details: NodVerifyCertificateChain failed: NodVerifyTrustResult: 42, NVT_NotTrusted, X509ChainStatus: 0x4, X509CSF_Revoked, certificate"

We have a backup of the old server certificate, but would like to use the new one. Is there some step that we may have missed when we changed the old certificate? We haven't restarted the server after the change. Could that be the issue?

Edited by Georgi Stoychev
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You wrote that the original server certificate was about to expire. If it has already expired in the mean time, restoring it won't help. Wouldn't it be easier just to re-deploy the management agent on those machines using current certificates?

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Hi Marcos,

The old certificate was about to expire next month. We just restarted the server and we can see that the clients are connecting again.

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