I have 1 forest(1 root DC,2 child DC) and each child DC have one exchange server. Exchange server is exchange 2003. I'm use old image file on vmware all of 5 server. I meet problem can't replicate but I solve by use registry. Now I try to move one mailbox from one exchange server to another but when I'm go inside to exchange task, listbox serrver and mailbox store is disable. I can't move mailbox. Any suggestion is appreciate!