mailbox last logged on

in EAC, we can check the last access date and time for a mailbox. to check for the actual username, i've been told, is to use the EMS.

so i used,

Get-MailboxStatistics -Identity bugs| Select LastLoggedOnUserAccount, LastLogonTime

and it returned,

LastLoggedOnUserAccount                                     LastLogonTime
-----------------------                                                  -------------
                                                                              7/7/2015 3:25:52 PM

without a username.

then i used,

Get-MailboxStatistics -Identity bugs

and it returned,

DisplayName               ItemCount    StorageLimitStatus                                                 LastLogonTime
-----------                     ---------           ------------------                                                        -------------
Bugs Bunny                5080                                                                                          7/7/2015 3:25:52 PM

is there a way to find the actual username? do i assume the "ItemCount" is the number of mail items currently in the mailbox?

Regards,

Reno