Hi,
In the X:\Program Files\Microsoft\Exchange Server \V15\Logging\Diagnostics\DailyPerformanceLogs folder, you will find files named ExchangeDiagnosticsDailyPerformanceLog_MMDDHHMM.blg. These files
are used by Managed Availability framework (which runs as the Microsoft Exchange Health Management service) to track the health of system components in Exchange. And they are generated automatically and take up disk space.
You can control how much data is stored in the daily performance logs by editing the Microsoft.Exchange.Diagnostics.Service.exe.config file, as what
Sathish suggestioned above.
You may find the following:
<add Name="DailyPerformanceLogs" LogDataLoss="True" MaxSize="5120" MaxSizeDatacenter="2048" MaxAge="7.00:00:00" CheckInterval="08:00:00"
/>
You can change the value of LogDataLoss to "False" or increase the MaxSize and MaxAge values to higher if you have the space.
Best regards,
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