Domain Controller Round Robin
ExactAccess will use all of the domain controllers returned by the domain in a round robin fashion to spread the work load across multiple servers. To exclude a particular domain from being contacted, you must add it to the ExcludeDCs list.
TIP
It is recommended to exclude any domain controller that is not on the local sub-net (such as DCs that are located across a WAN link) so that a slow link does not impact performance.
Under the configured domain registry key, add a comma separated list of DC names to exclude.
Example: the DCs for XAENG are: dc01, dc02, and wandc01
HKEY_LOCAL_MACHINE\SOFTWARE\HealthCast\ExactAccess\XADSNT\Servers\XAENG
ExcludedDCs:reg_sz="wandc01"
This will exclude the wandc01 domain controller from being contacted by the XA server for user and role lookup operations.