If we want to check when a user last logged on to their mailbox in Exchange 2007 and 2010 we have to use the Exchange Management Shell [EMS] and the following cmdlet:
Get-MailboxStatistics <<User>> | Select LastLoggedOnUserAccount, LastLogonTime
Note that the LastLoggedOnUserAccount property indicates the account last used to log on to the mailbox. This could be a user with FullAccess permissions to the mailbox, a delegate or even someone simply checking the user’s Calendar!
With Exchange 2013 part of this information is now available through the Exchange Administration Centre as well. If you:
- Navigate to Recipients and then Mailboxes;
- Double-click on the user you want to check this information for;
- Select the Mailbox Usage tab and in there you will see the Last Logon date and time.
However, to check who actually logged on, we still need to use the EMS...