Implementing sites:

Forceful replication:

On DC
Start >programs> admin tools > ADSS > expand sites > default first site>servers
>Expand DC server > NTDS settings >right click on automatically generated
>replicate now>ok.
Repeat the same for DC & ADC

Creating a site:

Open ADSS>Right click on sites>New site>Site name (e.g. UK, US)
Select default site link>Ok

Moving ADC into another site:

Select ADC>Right click on ADC>Select move>Select site.

Creating a Site link:

Expand inter site transports>Right click on IP>Select new site link
Link name (ex. Link US –UK)

Scheduling a site link:

Expand inter site transport>IP>Double click on site link>Change schedule
Click on replication not available>set the timings>click on replication available.