I have an Exchange cluster with 1 DC/GC in the same site and another 6 DCs in differnet sites in this child domain. In the topology log only 1 other DC is listed in the child domain but for DR I need another one... DNS is AD integrated. What tools can use to find out why some of the other DCs are not getting picked up as suitable for DSAccess? Is it anything to do with replication order between DCs? TIA, gwp