Hello everyone We have a DAG cluster of two Exchange 2016 Std.5 Databases and 300 mailboxes in our office. Each node of the cluster has two NICs (MAPI and Replication) on the same network 10.50.1.0/24 and a shared witness folder. As part of building a fault-tolerant infrastructure, one of the nodes of the Exchange cluster will be moved to the Data Center. The Data Center has a different subnet 10.50.122.0/24, but in the same Active Directory site. There is a 1gbit/s bandwidth channel between the central office and the data center. Please tell me, is there a standard scheme for dividing two nodes of the same DAG cluster in different subnets and how to do it correctly and recommended? On one of the nodes, the addresses will change to the MAPI NIC and replication. Is it possible to use NICs for replicas for different networks?
A little clarification. The Active Directory site is bound to the subnet 10.50.0.0/16-by mask 16. But we use addressing by 24 mask. If I change the mask from 24 to 16 on the Exchange nodes, will this mean that logically then the nodes are in the same subnet and additional settings will then be required. Or is it impossible to do this, since this may affect the anti-spam clients and border servers? Thanks!