Our company has 3 offices located in UK, UAE and India. All 3 locations are using active directory domains but are not connected together and all of them having different namespace. Now we need to integrate/connect these 3 domains together. Having different domain names is acceptable but if there is a way to bring them into a unique domain name would be nice. So, in order to achieve this how these locations should be connected? ..through VPN or any other technology? 2 sites are using 192.168.10.x subnets...Do we need to change these subnets?
Recently we acquired another company that has it's own active directory forest running and is using 192.168.10.x subnet. We need to create a trust relationships with that company too..At this moment, there isn't any connection between these 2 companies.
Please direct me through the steps to achieve this..thanks