4 Node DAG & FSW – Queries

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    We are migrating from Exchange 2007 to Exchange 2013.

    Exchange 2007 is a single box with all roles in one.

    OS – Windows Server 2008 Enterprise Version 6.0 (Build 6002) Service Pack 2

    Exchange – Microsoft Exchange Server 2007 Version

    All Mailbox servers on Exchange 2013 below are on

    Windows Server 2012 R2 Standard Build 9600
    Microsoft Exchange Server 2013 Service Pack 1 Version 15.0.847.32
    Our setup for Exchange 2013 is 4 mailbox servers and 1 CAS.

    EXMB01 – DB1 (Active) DB2 (Passive)
    EXMB02 – DB2(Active) DB3 (Passive)
    EXMB03 – DB3 (Active) DB1 (Passive)
    EXMB04 – DB 1, DB2 & DB3 (All Passive) – The main reason for this mailbox server is for running mailbox and db backups to ensure the other servers do not get loaded.
    My questions are:

    How do I setup a DAG in this setup.
    How many DAG groups must I have?
    I have a non-exchange machine setup as FSW. Kindly advise how I need to configure this?
    For coexistence between Exchange 2007 and Exchange 2013, kindly advise the minimum versions and/or service packs required.
    Appreciate your help in this to ensure the migration is smooth.

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