How to Join Vista machine in NT domain
1. SRVMGR.EXE on the PDC and add the computer name of the Vista PC. 2. On Vista PC run, secpol.msc then Under Local Policies > Security Options, Change the following two settings" - Domain Member: Digitally Encrypt sign secure channel data (always) - change to disabled - Network Security: LAN Manager authentication level - change to "Send LM and NTLM - use NTLMv2 session security if negoitated"