On vCenter Server 8.0, when attempting to check for vCenter updates from within the VAMI, the update check fails with the error: "Target URL certificate verification failed.
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VMware vCenter Server
To resolve this issue, perform the following:
Note:
As an alternative to updating the vCenter, refer to KB Patching/Updating VMware vCenter Server Appliance VCSA and Platform Service Controller PSC through Appliance Management Interface VAMI.
If updating via ISO, ensure the correct Full Patch (FP) ISO has been downloaded. For example, refer to the below screenshot: