Certain MailboxStatistics properties are not updated when a user uses a POP3 or IMAP4 client to access a mailbox in an Exchange 2010 environment

Applies to: Exchange Server 2010 EnterpriseExchange Server 2010 Standard


When a user logs on to a Microsoft Exchange 2010 mailbox by using a POP3 or IMAP4 client, the LastLogonTime, LastLogoffTime, and LastLoggedOnUserAccount property of the mailbox are not updated. Therefore, the Get-MailboxStatistics command returns an incorrect value when you run the command to query these properties.


This issue occurs because the Exchange store cannot recognize client strings from POP3 and IMAP4 clients.


To resolve this issue, install the following cumulative update:
2661854 Description of Update Rollup 2 for Exchange Server 2010 Service Pack 2

More Information

For more information about MailboxStatistics properties, visit the following Microsoft website:For more information about the Exchange 2010 store, visit the following Microsoft website: