On Saturday morning (first day of week here) the database is dismounted, the following are the error messages, E002 is missing, and I search the whole machine for it and its not there, virus scanner is setup correctly, it doesn't scan inetpub and all storage drives and log drives, and log file extensions, etc... all the folders and extensions to exclude recommended by Microsoft, its the same database always (there are multiple mailbox stores and storage groups), what could else be the problem? Of course it starts with missing the E002 and goes all the way to dismounting the database. What can I do to explain and workaround this? thank you rc Information Store (2792) An attempt to move the file "F:\Faculty SG\Faculty Log 02\E02.log" to "F:\Faculty SG\Faculty Log 02\E02000FB.log" failed with system error 2 (0x00000002): "The system cannot find the file specified. ". The move file operation will fail with error -1811 (0xfffff8ed). An error occurred while writing to the database log file of storage group "Faculty". Attempting to unmount all databases in this storage group. Information Store (2792) The logfile sequence in "F:\Faculty SG\Faculty Log 02\" has been halted due to a fatal error. No further updates are possible for the databases that use this logfile sequence. Please correct the problem and restart or restore from backup. Information Store (2792) Unable to rollback operation #16447310 on database E:\Faculty SG\Faculty MB\Faculty Mailbox Store.edb. Error: -510. All future database updates will be rejected. Database error 0xfffffbbe occurred in function JTAB_BASE::EcConfig while accessing the database "Faculty\Faculty Mailbox Store". LiveUpdate was unable to complete successfully.