Dung Dinh (2/6/2013)

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SQLAJ (2/6/2013)

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Are you sure you have both the old and new user on the server? Is it only windows authentication? Do you know the SA account/password? You could also look at this. I ran into a similar issue a few weeks back where the Windows SysAdmin moved the VM from one domain to another without telling me. Oops!

I was able to fix it and it is not all that difficult.

http://sqlaj.wordpress.com/2013/01/25/no-admin-account-on-server/

I sure that I selected Windows Authentication Mode. Unfortunately, I dont know pass for SA user. After changing to new domain, I use the new user T_new\dtdung to login my computer. Maybe, I will try to apply your suggestion.