Does R12.52sp1cr07 supports configuring the AD VIP in User Directory instead of using the AD Domain Controllers.
Yes, it does support configuring VIP or Hardware Load-balancer url of AD in User Directories, in this case VIP/LB would be responsible for Loadbalance/failover between the available AD DC's.
However Siteminder has got it's own inbuilt LB/Failover mechanism, if you want to use individual AD DC's, refer the below document link for detailed explanation.
LDAP Load Balancing and Failover - CA Single Sign-On - 12.52 SP1 - CA Technologies Documentation
Review : https://comm.support.ca.com/kb/does-policy-server-supports-external-load-balancer-for-userstorepolicy-store/kb000011357
Be careful of what a VIP is.
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