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Set-EventLogLevel

Use the Set-EventLogLevel cmdlet to set the event log level registry value for the specified category. Exchange PowerShell reference

From the Exchange PowerShell reference 4 parameters Its page in the reference

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Parameters

4 in the Exchange PowerShell reference
-IdentityThe Identity parameter specifies the name of the event logging category for which you want to set the event logging level.
-LevelThe Level parameter specifies the log level for the specific event logging category.
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.
-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.