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Get-UMCallSummaryReport

Use the Get-UMCallSummaryReport cmdlet to return statistics about all calls received or placed by Mailbox servers running the Microsoft Exchange Unified Messaging service in an organization. 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
-GroupByThe GroupBy parameter specifies how to return the results.
-DomainControllerThe DomainController parameter specifies the domain controller that's used by this cmdlet to read data from or write data to Active Directory.
-UMDialPlanThe UMDialPlan parameter specifies the Unified Messaging (UM) dial plan to show statistics for.
-UMIPGatewayThe UMIPGateway parameter specifies the UM IP gateway to show statistics for.