Hi
Inaddition to wendy,check this for SID migration(also ADMT is the best tool for migration scenarios);
https://technet.microsoft.com/en-us/library/cc974384%28v=ws.10%29.aspx?f=255&MSPPError=-2147217396
This posting is provided AS IS with no warranties or guarantees,and confers no rights. Best regards Burak Uğur