This is more of a heads up for exchange admins who are thinking of moving from legacy exchange to 2010. Simple things, running Get-MailboxDatabase in Exchange Shell only displays the Exchange 2010 databases.
If you want to see or manage the legacy databases, the command is Get-MailboxDatabase –IncludePreExchange2010
Same with public folder databases. Get-PublicFolderDatabase only list Exchange 2010 databases.
Running Get-PublicFolderDatabase –IncludePreExchange2010 lists all databases.
But, running Get-ExchangeServer lists all Exchange servers.