To Specify the Windows Accounts to Be Synchronized

Under the Windows Security System datasource node, expand User Synchronization Service > Synchronized Accounts.
Right-click Users and select New > Synchronized User.
When the New Synchronized User Wizard opens, click Next.
On the Selecting account source page, do one of the following:

If the local computer has access to the domain containing the users and groups to be synchronized, turn on Use local computer and click Next.

or
To use another computer that has access to the domain containing users and groups to be synchronized, turn on Use this computer, type or browse to the name of the required computer, then click Next.
On the Selecting users page, do the following:
1. From the Domain list, select the domain containing the user accounts you want to synchronize.
2. From the Available Users list, select the required users and click Add.
3. Users can be selected from more than one domains. Repeat the steps above to add users from other domains.
4. Click Next.
On the last page, click Finish.

The selected users are added to the Synchronized Accounts > Users folder. You can now synchronize these accounts to either create new or update existing accounts in the datasource.