Recently one of our customers had a new Exchange server installed with Server 2008 SBS and Exchange 2007
During the installation we PST'd the public folders off and imported them into the new server (no problems there) however yesterday they had a problem where all be the very most recent entries had disappeared (I used the calendar entries as a focal point to work with) anyway I restored the EDB file from their backup ran a repair on the database and it mounted fine bringing back all their information....
HOWEVER
They've rang in again today saying all my hard work yesterday has been for nothing as again everything bar the most recent entries have gone missing
Is there something that I'm missing about Exchange 2007 that removed entries after a certain amount of time?
During the installation we PST'd the public folders off and imported them into the new server (no problems there) however yesterday they had a problem where all be the very most recent entries had disappeared (I used the calendar entries as a focal point to work with) anyway I restored the EDB file from their backup ran a repair on the database and it mounted fine bringing back all their information....
HOWEVER
They've rang in again today saying all my hard work yesterday has been for nothing as again everything bar the most recent entries have gone missing

Is there something that I'm missing about Exchange 2007 that removed entries after a certain amount of time?