In Exchange 2003 SP2 (Exchange 6.5.7638.1) how can I safely clear the transaction log files?

In Exchange 2003 SP2 (Exchange 6.5.7638.1) how can I safely clear the transaction log files?

How much of the previous transaction log files do I want to leave on the server (such as the last week, month, etc.?)

For the transaction log files that I do delete, how will this affect the Outlook emails that are associated with these transaction logs?
IT GuyNetwork EngineerAsked:
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Alan HardistyCo-OwnerCommented:
You will not be able to properly recover your mailstore from backup should you need to.
If you backup normally, this will backup the store and logs.  Once completed, the logs are purged as you have backed them up.
If you do not backup the store and logs and then purge the logs and the store gets corrupted, then you can only restore the database to the point of the last backup, after which, you need to replay the transaction log files to place all mail that arrived agter the last full backup, into the store.
No log files - no mail.  So you could end up with all your mail up to the point of the last backup, then a large gap and then new mail arriving after the restore has taken place.
Not the best situation to find yourself in.
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Alan HardistyCo-OwnerCommented:
You should not be manually deleting the Exchange Transaction Log Files.
If you are running an Exchange Aware backup, the log files will automatically get deleted once the store and logs have been backed up.
What backup are you using, assuming that you are running backup?
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IT GuyNetwork EngineerAuthor Commented:
Vertias Backup Exec 9.1 Rev 4691 is being used.
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Alan HardistyCo-OwnerCommented:
Thanks - What type of daily / weekly backup jobs are you running?
If you run a full backup and include the Exchange Store / Log files in the Full backup, you should get the logs purged at the end of the backup.
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Alan HardistyCo-OwnerCommented:
Is the Backup Exec Job set to perform a "Full - Database & Logs (Flush committed logs)"?
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IT GuyNetwork EngineerAuthor Commented:
alanhardisty,

Just out of curiosity, what will happen if I manually clear the Exchange Server 2003 Transaction Log files?
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IT GuyNetwork EngineerAuthor Commented:
We finally chose to purchase two additional hard drives to add to this server in order to increase storage capicity.
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