Exchange 2013 & 2016: System logs = Disk getting full

On Exchange 2013 and 2016, you can often see that the logging directory is growing, maybe too fast for your storage.

You can circumvent this, by implementing this script in task scheduler and running via Powershell:

gci ‘c:\Program Files\Microsoft\Exchange Server\V15\Logging’,’C:\inetpub\logs’ -Directory | gci -Include ‘*.log’,’*.blg’ -Recurse | ? LastWriteTime -lt (Get-Date).AddDays(-7) | Remove-Item

This one will delete all Exchange and IIS logs older than 7 days.

Source: https://social.technet.microsoft.com/Forums/exchange/en-US/5b9dd872-5803-4dae-83d1-584424b7bd94/exchange-2013-system-logs-disk-getting-full?forum=exchangesvradmin