Hi;we have exchange 2010 sp2 mail systems.all database mount.but,some users can't access their mailbox from owa in db13.they receive following error message "The item you tried to access no longer exists. The item wasn't found. You or a delegate might have moved or deleted it using another computer or a mobile phone." can you help me,please.?

Can you move a user from DB13 to another DB and test? If that works could be your DB13. Create a new user on DB1 and test.Sukh

moved user to another db.but,moving is failed.thanks...

Why has it failed? Checked logs? High bad items? increase this, if more than 51 or higher, then use the shell to set to AcceptLargeDataloss and test. Create a new user on DB13 and test?Sukh

created a test user in db13.no problem.test user access mailbox form owa.

Can you try to repair request and see what the results are? Also, did you look into moving another user to another DB or looking into that failed move http://technet.microsoft.com/en-us/library/ff625221.aspxSukh

http://technet.microsoft.com/en-us/library/ff625221.aspx applied above commands but no change.

Also, did you look into moving another user to another DB or looking into that failed moveSukh

Hi, Do you have backup for db13? I recommend you to recover these problematic mailbox from backup and then check the issue again. How to Restore an Individual Exchange 2010 Mailbox with Windows Server Backup ? http://blogs.technet.com/b/jribeiro/archive/2011/01/05/how-to-restore-an-individual-exchange-2010-mailbox-with-windows-server-backup.aspx Restoring Exchange 2010 Mailbox Databases to RDB using System Center Data Protection Manager http://blogs.technet.com/b/dpm/archive/2012/04/16/restoring-exchange-2010-mailbox-databases-to-rdb-using-system-center-data-protection-manager.aspx Besides, please let me know if these account has delegator.Xiu Zhang TechNet Community Support