Current Setup: I have child 2 domains, one in America (amer.domain.com) and one in Asia (asia.domain.com) in the same forest. Both domains are connected via MPLS links.
In each physical site, there is 1 domain controller that is joined to the trusted child domain.
Example: Domain Controller in Singapore would typically be joining asia.domain.com, but there will be 1 domain controller joined to amer.domain.com (for reference purpose, lets call it sng1.amer.domain.com)
Issue: Being in Singapore, when I want to browse amer.domain.com, the ADUC utility will connect to sng1.amer.domain.com
It takes about 1 minute to connect it and roughly 3-4 minutes to do a simple search for objects. This does not happen when a user in America uses ADUC to search asia.domain.com, which would connect to a domain controller which is joined to the asia.domain.com
What could be the issue and how would I be able to determine what's causing this?