Hi,I have searched the forums for this problem with no success- but apologies if this is has been answered elsewhere.We're trying to install Exchange 2007 on a DAS setup- 2 W2K3 servers with a shared diskset. Choose the "Active" mailbox role, the first two install elements go fine ("Copy Exchange Files" and "Mailbox Role") but then the clustered mailbox server role fails. The text is:"Error:Error of unknown type occured while performing exsetdata operation; the original error code was 0x103fd2c"Has anyone encountered this before, and if so has anyone succeeded in resolving it ?