BESRO 8.5.3 Exchange Server 2007 MessageTrackingLog retention question

[Symanticus]

Hi All I've got a question that need some more clarification regarding Exchange Server 2007 Message tracking log.

Each week (Sunday) i do Full backup using Symantec Backup Exec System Recovery 8.5.3
and Incremental backup every other day.

when I execute the following script to get the Distribution usage statistic, does this means i get the last week worth of data instead of whatever i put into the -Start parameter ?

#-------------------------------------------------
#Count for each group of messages
#------------------------------------------------
#

Get-MessageTrackingLog -Start 1/1/2009 -EventId Expand | group-object RelatedRecipientAddress | Sort-Object Count | ft Name,Count -Autosize

#


I believe that by using Full backup the transaction log gets flushed.

Can Anyone please shed some light in this matter.

Thanks

[marcogsp]

Yes, it is normal for Exchange to flush the transaction logs after a full backup.  The high availability features like LCR and CCR have been known to interfere with this process.  In BESR, proper communication with the Exchange VSS writer is required in order for the logs to be properly truncated.  Otherwise, the logs might continue to grow to an unmanageble size