Hello, We have an Exchange 2007 CCR environment (RTM), fully hooked up to a UPS, Generator, the works.... of course all of that equipment needs to be hooked up correctly to work Needless to say, the entire rack that both servers are in lost power. When the servers came back up, one of the DB's was growing at 1GB/hour for about 20 hours. The transaction log activity was higher than usual, but not rapid. I dismounted the DB, ran a eseutil /MH and ensured that the DB was a clean state. It was. I also checked the message tracking logs & queues for any sign of a loop, nada. I tried failing over from Active -> Passive, no problem, but the DB continued to grow. Curiously, right after the full backup ran the DB stopped growing. The only other time I have experienced similar activity was an Entourage client that had emails stuck in the Outbox and was causing havoc with the transaction logs. However, this didn't result in DB growth. I would greatly appreciate any input on this, thanks! Matt

Hi Matt,It's just a thought. 1) disable CCR 2) ran full backup on exchange db so it can clean transaction log to see if the problem fix 3) enable CCR or the worse case is to create new db and gradually move users to new db (I think it's best to disable CCR before performing this step so transaction log don't eat up the space)4) Open a ticket with Microsoft and let see Microsoft can explain it and it may be a quick fix or a known bug. save your time.

Hi Matt, The issue can be caused by server factors. Thus, would you please help me gather the Application Log and Message Tracking log for further research? Please help me gather the Message Tracking log on the day which database size increases fast. You can send the information to me at v-mishen@microsoft.com. Please also let me know the time when the issue occurs and when the issue disappears. Whether the database file which increases fast is a mailbox database or public folder database. In addition, please consider the following suggestion: 1. Please ensure the Database file and related Exchange folders have been excluded from Anti-virus software scan 2. Run ExBPA and fix the database related issues 3. As the database size may grow fast if a specific client operates abnormally, I would also like to recommend a tool which is helpful to troubleshoot the type of issue. In case the issue occurs again, we can use the Exmon tool to monitor the top users. If a user is almost in the top-10 user list (on CPU usage), we should pay more attention. Ask the user close mail client or temporarily disable this user account and verify if the situation improves. You can download the tool from the following site: Microsoft Exchange Server User Monitor http://www.microsoft.com/downloads/details.aspx?FamilyID=9A49C22E-E0C7-4B7C-ACEF-729D48AF7BC9&displaylang=en Installing Microsoft Exchange Server User Monitor http://www.msexchange.org/tutorials/Microsoft-Exchange-Server-User-Monitor.html Mike

Hey Mike, Thanks for your detailed response. I will collect the data and send it over your way. Regarding your other points.... 1. Database/Exchange folders are not being scanned by AV. 2. Database Troubleshooter found no issues, neither did Mail Flow Troubleshooter 3. is ExMon supported in Exchange2007? The links you've provided all reference Exchange2000/2003. I haven't had much luck finding any details on ExMon online other than some mentions of it not working on 07. Matt