Windows 2003 is the Domain Controller. Adprep utility was ran before introducing Windows 2008 to the domain. There is also an existing application server SQL 2000 on Windows 2000 server machine (no roles).
Would the fact that Windows 2003 is the domain controller (instead of windows 2008) cause application performance issues on a large flat file database that is kept on the Windows 2008 shared folder and accessed by workstations on the local network through drive mapping
We do not have any issues with other application, printing, internet browsing etc?
Software vendor claims (unsubstantiated by any documents, network performance stats or proof) that Windows 2003 being the domain controller (instead of windows 2008) is causing the issue?