Hi, In preparation for an Exchange migration (Ex2000 to Ex2003-SP2) I recently installed an Exchange 2003 server on a new box running W2003 Server. Everything went well, I can see both Exchange servers from the ESM, OWA is accessible on a test Mailbox that I moved from the "old Exchange" to the "New Exchange" server. After the installation I had to move the MDBDATA folder to a larger partition on the same local disk. I used the ESM to do so (Unmounting, Changing the DB path and Re-Mounting).... only now OWA prompts for a User ID and Pwd but is not accessible. In IIS, I cannot see any of the 3 system mailboxes created at installation time nor the test mailbox that I moved from the "Old server". From what I found the "backofficeStorage" has to do with ExoleDB... but this is as far as I can take this. Does someone know how to change the physical path/location associated with "backOfficeStorage"? All help is much appreciated. Thanks, Claude