512K VPN line to connect 2 remote offices, they have own DCs. We just transfer file or PC remote through these VPN lines.
Domain A ------- 512K VPN --------- Domain B
Now we will setup new office again, but my BOSS asks me that we can centralize account management in Head Office with new remote site?
1. Move Additional Domain Controller of Domain A (w/ Global Catalog) to new site D ?
2. Build up Child domain on new site D ?
3. Just linked up by 512K thin VPN tunnel, is it enough to support frequent replication for 1 or 2 ?
4. Or Seperate Domain (DCs) like as Domain B and Domain C ?
Can tell me which one is the best solution please ? (why?)