Hello List, I have W2K, Exchange 2K, ISA2K installed on my server. I must have done something wrong when playing with Security tab on my Exchange server's properties window as I no longer am able to access users' mailboxes on M: (Exchange) drive. I also need to backup all the mailboxes using EXMERGE, which I think requires full control (including Send As and Receive As). I have tried to give another account (newadmin, which is a member of Administrtor Group) full permissions and log on with newadmin, but still no success. Please help me.. Thanks in advance. Sushil Bhalla