Troubleshooting XProtect Update Manager
Log files
To troubleshoot system errors, you can find the log files on the hosts where you have installed the different XProtect Update Manager elements in the following folders:
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On the hosts: C:\ProgramData\Milestone\XProtect Update Manager\Agent\Logs
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On the server: C:\ProgramData\Milestone\XProtect Update Manager\Server\Logs
Hotfixes
Error in the agent log file when installing a hotfix: A certificate chain processed, but terminated in a root certificate which is not trusted by the trust provider.
If the root certificate auto-update is disabled, XProtect Update Manager might fail to install a hotfix on a host. To enable this setting, see https://learn.microsoft.com/en-us/previous-versions/windows/it-pro/windows-server-2008-R2-and-2008/cc734054(v=ws.10)#turn-off-automatic-root-certificates-update.