Currently we have two nodes of Exchange 2016 in DAG mode and mailbox database are resides on NTFS formatted drives. Now we are planing to add another two Exchange 2016 nodes will create separate DAG in same environment but will set ReFS file system on this DAG and Mailbox Databases will resides on ReFS formatted drives.
Q1. Is there any precautions for adding second DAG in same environment?
Q2. Creating second DAG in same environment is best practice or not?
Guys please suggest.