You lose roll-forward recovery from the last backup. I would recommend that you cleanly do a restart of the Information Store service to ensure that all the required transaction logs have been properly committed. Regards, Michael B. Smith Consultant and Exchange MVP http://TheEssentialExchange.com From: exchangelist-bounce@xxxxxxxxxxxxx [mailto:exchangelist-bounce@xxxxxxxxxxxxx] On Behalf Of Todd Lemmiksoo Sent: Monday, April 19, 2010 7:21 PM To: exchangelist@xxxxxxxxxxxxx Subject: [ExchangeList] Exchange 2003 transaction logs deleted? What trouble is caused if the Exchange log files are deleted before a full backup is taken? One of the junior techs deleted most of the log files to "free up space".