Creating Public Folder Mailboxes in Exchange 2013

As part of migrating public folders from Exchange 2010 to Exchange 2013, the KB article https://technet.microsoft.com/en-us/library/dn912663(v=exchg.150).aspx says to create the public folder mailboxes by running the script below with a previously generated .csv file. My example is:

.\Create-PublicFolderMailboxesForMigration.ps1 -FolderMappingCsv PublicFoldertoMailbox.csv -EstimatedNumberOfConcurrentUsers:500

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Is there any way to specify the database to create the mailboxes in?

Orange County District Attorney