Hi Experts, Please help me,slove this problem. 1> I backup the exchange log and database file on a HDD. 2> I formated HDD and reinstalled a new win2000 and exchange server. 3> I wanna restore the exchange public folder and mail box (55gb data) to the new win2000 server 4> The new win2000 server can not mount the files. (integrity error!) Please tell me how to restore the data. Thank you very much! Kenny