CmdID

CmdID / PowerShell / Cmdlets / Remove

Remove-QuarantinePolicy

Use the Remove-QuarantinePolicy cmdlet to remove quarantine policies from your cloud-based organization. Exchange PowerShell reference

From the Exchange PowerShell reference 2 parameters Its page in the reference

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Parameters

2 in the Exchange PowerShell reference
-IdentityThe Identity parameter specifies the quarantine policy you want to remove.
-DomainControllerThis parameter is reserved for internal Microsoft use.