Microsoft just released Update Rollup 2 for Exchange 2007 SP1. This includes various fixes ranging from correcting functionality to solving crashes.

Worth noticing is the fix for a problem discussed in our recent article Import-Mailbox Problems with Outlook PSTs.

947391 The contents of .pst files are not imported into Exchange Server 2007 mailboxes when you use the Import-Mailbox cmdlet.

For the complete list of fixes check KB948016.

The update is available through Microsoft Update and can also be downloaded directly from the MS Download center.