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Get-DlpPolicy

Use the Get-DlpPolicy cmdlet to view existing data loss prevention (DLP) policies that are based on transport rules (mail flow rules) in your 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 DLP policy that you want to view.
-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.