windows2003 domain scan

windows2003 domain scan

Hi,
please help.
there are A,B,C three domain, connected by VPN. trusted each other.
SD+ installed in domain A.
B with nt4 domain.
C upgrade nt4 to windows2003.

the problem is :
domain B can be scanned now.
domain C can be scanned when it was nt4, when upgrade to windows2003, I try to scan the windows domain, it get the result of the total of workstation same as domain A, but only one is successful scan, all other are failed scan. but can scan workstation one by one.

I checked the 135/445 port, WMI, DCOM, etc. all are ok.
why?

urgent!













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