You have an Exchange Server 2013 organization that is integrated with Microsoft Lync Server 2013.
You need to generate a report that shows the statistics of all the calls received or placed by the
Mailbox servers during the last 12 month.
Which cmdlet should you use?

A.
Get-UMPhone Session

B.
Get-UMService

C.
Get-UMCallDataRecord

D.
Get-UMCallSummaryReport

Explanation:
The Get-UMCallSummaryReport cmdlet displays the aggregated statistics about all calls received or
placed by Mailbox servers running the Microsoft Exchange Unified Messaging service in an
organization including voice messages, missed calls, subscriber access, auto attendant, or fax calls.
Parameters include GroupBy. The GroupBy parameter displays the daily statistics for the last 90
days, monthly statistics for the last 12 months, or a summary of all call statistics for your Mailbox
servers running the Microsoft Exchange Unified Messaging service in your organization.
Get-UMCallSummaryReport
https://technet.microsoft.com/en-us/library/ff459267(v=exchg.150).aspx