Hi All, Whenever outlook clinet sends out attachment more than 11 MB, MS exchange transport service got stop and we are getting the following errors in event viewer. Event Type: Error Event Source: ESE Event Category: Transaction Manager Event ID: 623 Date: 2/25/2008 Time: 5:53:03 AM User: N/A Computer: ABC Description: edgetransport (5612) Transport Mail Database: The version store for this instance (0) has reached its maximum size of 249Mb. It is likely that a longrunning transaction is preventing cleanup of the version store and causing it to build up in size. Updates will be rejected until the longrunning transaction has been completely committed or rolled back. Possible longrunning transaction: SessionId: 0x0000000005217400 Sessioncontext: 0x00000000 Sessioncontext ThreadId: 0x00000000000014F8 Cleanup: 1 For more information, click http://www.microsoft.com/contentredirect.asp. ++ Event Type: Error Event Source: MSExchangeTransport Event Category: Storage Event ID: 17017 Date: 2/25/2008 Time: 5:53:03 AM User: N/A Computer: ABC Description: Transport Mail Database: Quota exceeded while performing a database operation. The Microsoft Exchange Transport service is shutting down. Exception details: Microsoft.Exchange.Isam.IsamVersionStoreOutOfMemoryException: Version store out of memory (cleanup already attempted) (1069) mail flow stopped on HT servers, transport DBs maxxing out mail flow stopped on HT servers, transport DBs maxxing outCould you please guide me how to incrase the Trnasport DB quota on server. Thanks.Sunil Bansal.

What is your architecture like?Check the amount of free space you have available on your Hub Transport server. The HT Server will have queues located for mail delivery. Check your driveletter:\Program Files\Microsoft\Exchange SErver\Transportroles\dataUnder there you will see a Queue directory. That may be your problem. If the drive where your HT Server has the queues is full then that is your problem.You can move the location of the directory.How to Change the Location of the Queue Database:http://technet.microsoft.com/en-us/library/bb125177.aspxSF - MCITP:EMA, MCTS