Hi All, I recently rebuild my SBS2003 environment to a new domain: current domain is doB, and previous domain was doA. The deployment went smoothly, before reinstalling SBS2003 I ran an NTBackup of exchange first storage Group plus system state. Now I am unable to mount mailbox store after run Exchange NTBackup Restore, here is the method i followed: http://www.petri.co.il/restore_exchange_2000_2003_with_ntbackup.htm I have been searching around for the solution but no joy; here are some of the Google ups I have tried http://www.google.co.za/search?sourceid=navclient&aq=t&ie=UTF-8&rls=GGLJ,GGLJ:2006-41,GGLJ:en&q=an+internal+processing+error+has+occurred Please help Many thanks