XP Pro and NT4 PDC logon problem.........

[spencet 0]

Running a small network with Win2KPro and WinXP Pro clients and NT4 server. Then Win2KPro machines can log into the NT PDC, but the XP boxes can not. This is the error in event viewer:

 

"The session setup to the Windows NT or Windows 2000 Domain Controller \\NTSRVR1 for the domain HOME failed because \\NTSRVR1 does not support signing or sealing the Netlogon session. Either upgrade the Domain controller or set the RequireSignOrSeal registry entry on this machine to 0."

 

Is XP supposed to be compatible with an NT4 PDC out of the box, or do I have to tweak NT4 to accept the XP logon?

 

Thanks for the help!