I have a forset contains single domain Mydomain.com and have two sites SiteA and SiteB
at SiteA there is two Domain controllers server names like:CA1 and CA2 both are Dell PowerEdge1650 ,windows 2003 enterprise edition SP2 and they working well without problems.
in SiteB there are 3 Domain Controller All are Dell PowerEdge1650 windows 2003 enterprise edition SP2 servers names like:BA1,BA2 and BA3
SiteA and SiteB are connected through VPN IPSec tunnel using ISA Server 2006 Standard from both Sites
FSMO Roles are all at server BA1 at SiteB,Replication is well
All DCs are GC ,Time Servers ,DNS active directory integrated and DHCP except the FSMO roles holder server not contain GC.
I have a problem in Site B as only one server is act as a logon server BA1,in other words if this DC is offline ,clients fail to access shared resources and fail to logon to their computers.
Could you help me to solve this problem