There are several options you can set, but if you are just interested in configuring your inter-site replication to behave like your intra-site replication, then set the attribute to 0x1 (USE_NOTIFY). Please note that this option does affect replication traffic frequency between sites. To enable change notification between sites:
Using the AD Sites and Services Console
Using the ADSI Edit Console
Options for Change Notification (the options can be combined):
USE_NOTIFY
Setting the Options attribute to 1 will enable change notification (USE_NOTIFY). The “Options” attribute is set to a (0x1) to enable change notification which will bypass the Site boundaries replication schedule and frequency for inter-site replication.
TWOWAY_SYNC
This option forces a sync in the opposite direction at end of the sync. This option is rarely used but may be useful when connecting sites that use demand-dial routing.
DISABLE_COMPRESSION
This option disables compression between Sites. Busy bridgehead domain controllers with high CPU utilization could benefit from disabling compression.