Do you mean you want to export all monitoring records via PowerShell commands?（including system usage report, call quality report and so on)
Is there a way to export Monitoring Reports using PowerShell commands?
Our forum is mainly focused on the general issue of Skype for Business Server troubleshooting. According to your description, your question is related to PowerShell script development, which is not in our support scope. Thanks for your understanding and patience!
In this following [link], it talking about some tips about how to export the the QoE/CDR datan for your reference.
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