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Why are Exchange Server MDBDATA log files important?

Find out what Exchange Server MDBDATA log files are used for and why MDBDATA log files should never be deleted.

What are the transaction log files located in the MDBDATA folder within the Exchange server folder (Exchsrvr\MDBDATA) used for? Do we need to keep the MDBDATA log files or can we delete them?
MDBDATA log files are transaction log files which are an integral part of your Exchange database. For example, if your database ever fails and you have to recover from backup, the MDBDATA transaction log files can (under normal conditions) be replayed to bring your Exchange database to its most-recent state. As such, MDBDATA log files should never be deleted.

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This was last published in August 2007

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