Anyway to recover an ost file when the original server is gone and the computer with the "orphaned" ost is now joined to a new domain? Original server was W2K3 SP2 w/ E2K3 SP2.
My thoughts are to setup another "mock" server identical to the original server, rejoin this computer to the old domain and then try to deal with the security mismatch of the ost to the server?
There is enough information to rebuild the server exactly as it was before (including passwords).
You cannot connect an orphaned ost file to a new mailbox.
there is 3 things that must match, MAPI profile on client machine, ost file and mailbox. if you change any of those 3 the others will fail.
What you can do if you have the same MAPI profile configured, is to open the ost file while not bing connected to Exchange (offline) and then export data to a pst file. later you can import data from that pst file
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The best way to do so is to convert orphaned OST file to PST format. One can download a perfect OST to PST tool from http://www.filerepairtools.com/convert-ost-to-pst.html