Network directories, such as NDS, create server-to-server traffic. If this traffic crosses wide area network (WAN) links unmanaged, it can needlessly increase costs and overload slow WAN links during high-usage periods.
WAN Traffic Manager lets you control NDS traffic over WAN links by applying policies to NDS.
For example, you might restrict NDS traffic over a WAN link during high-usage times. This shifts high-bandwidth activities to off-hours. You might also limit replica synchronization traffic to times when rates are low to reduce costs.