An user's computers was reinstall the OS, we backup the zdb file, how can i restore a zdb file on outlook again? The reason i don't make a re synchronization with the server it's because we don't save the mail on server, thanks.

PS: I search this before but no answer's about this, i rename the zdb file to pst i backup before the zdb file of course, i try open it with outlook but fails it's display a message say's the pst file was corrupt, i also try to import with the assistant but it's displays the same error when i try to open, thanks if anybody can help me.