Backup doesn't truncate Exchange logs

Exchange 2003 (cluster) SP2 runs on Windows Server 2003 SP1. The log files can't be flushed after Symantec BackupExec 10d full backup. I've tried selection of all individual mailboxes+all public folders or selection of information store as a whole. I also tried to use Windows' own bakcup utility for a full backup on Exchange (infomation store). Neither truncated log files. What should I do to truncate the logs? Is it helpful and safe if I enable "Remove log files" in Exchange Properties (Currently "Enable subject logging and display" is selected; "Enable message tracking" is selected, but "Remove log files" is not selected)? Is there any other way to flush the log file besides changing Exchange logging scenario? Thanks.
mmassumiAsked:
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SembeeConnect With a Mentor Commented:
The tracking logs you can remove whenever you like.
I tend to store thirty days on low traffic sites, but if you are a high traffic site then you can probably limit it to seven days. Exchange will do the cleaning up for you.

Simon.
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dynamitedotorgConnect With a Mentor Commented:
Which logs files do you mean? Transaction logs or message tracking logs?

The "Remove log files" box there applies only to the message tracking logs stored in the directory shown under "Log file directory". The don't have any effect on the transaction logs.
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SembeeCommented:
Message tracking logs are not transaction logs. So the screen you are looking at will not do anything.
You can only stop transaction log build up by enabling circular logging, but that is not advised.

Anything logged when a backup runs?
There is a possibility that the logs are being marked as committed but not deleted.

Simon.
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mmassumiAuthor Commented:
It's message tracking logs which locates at "\Exchsrvr\exchange.log" folder. Each log file is 80-90 MB (one for each day). Is it safe to remove them older than 10-20 days?
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